+filename suggests it is for the right package and version.
+
+If the specified
+.I changesfile
+pathname contains slashes, the directory part is also used as
+the value for
+.BR --build-products-dir ;
+otherwise, the changes file is expected in that directory (by
+default, in
+.BR .. ).
+.TP
+.B --rm-old-changes
+When doing a build, delete any changes files matching
+.IB package _ version _*.changes
+before starting. This ensures that
+dgit push (and dgit sbuild) will be able to unambigously
+identify the relevant changes files from the most recent build, even
+if there have been previous builds with different tools or options.
+The default is not to remove, but
+.B \-\-no-rm-old-changes
+can be used to override a previous \-\-rm-old-changes
+or the .rm-old-changes configuration setting.
+.TP
+.BI --build-products-dir= directory
+Specifies where to find the built files to be uploaded.
+By default, dgit looks in the parent directory
+.RB ( .. ).
+.TP
+.BI --no-rm-on-error
+Do not delete the destination directory if clone fails.
+.TP
+.BI --dep14tag
+Generates a DEP-14 tag (eg
+.BR debian/ \fIversion\fR)
+as well as a dgit tag (eg
+.BR archive/debian/ \fIversion\fR)
+where possible. This is the default.
+.TP
+.BI --no-dep14tag
+Do not generate a DEP-14 tag, except in split quilt view mode.
+(On servers where only the old tag format is supported,
+the dgit tag will have the DEP-14 name.
+This option does not prevent that.)
+.TP
+.BI --dep14tag-always
+Insist on generating a DEP-14 tag
+as well as a dgit tag.
+If the server does not support that, dgit push will fail.
+.TP
+.BI -D
+Prints debugging information to stderr. Repeating the option produces
+more output (currently, up to -DDDD is meaningfully different).
+.TP
+.BI -c name = value
+Specifies a git configuration option, to be used for this run.
+dgit itself is also controlled by git configuration options.
+.TP
+.RI \fB-v\fR version "|\fB_\fR | " \fB--since-version=\fR version |\fB_\fR
+Specifies the
+.BI -v version
+option to pass to dpkg-genchanges, during builds. Changes (from
+debian/changelog) since this version will be included in the built
+changes file, and hence in the upload. If this option is not
+specified, dgit will query the archive and use the latest version
+uploaded to the intended suite.
+
+Specifying
+.B _
+inhibits this, so that no -v option will be passed to dpkg-genchanges
+(and as a result, only the last stanza from debian/changelog will
+be used for the build and upload).
+.TP
+.RI \fB-m\fR maintaineraddress
+Passed to dpkg-genchanges (eventually).
+.TP
+.RI \fB--ch:\fR option
+Specifies a single additional option to pass, eventually, to
+dpkg-genchanges.
+
+Options which are safe to pass include
+.BR -C
+(and also
+.BR "-si -sa -sd"
+although these should never be necessary with Debian since dgit
+automatically calculates whether .origs need to be uploaded.)
+
+For other options the caveat below applies.
+.TP
+.RI \fB--curl:\fR option " | \fB--dput:\fR" option " |..."
+Specifies a single additional option to pass to
+.BR curl ,
+.BR dput ,
+.BR debsign ,
+.BR dpkg-source ,
+.BR dpkg-buildpackage ,
+.BR dpkg-genchanges ,
+.BR sbuild ,
+.BR ssh ,
+.BR dgit ,
+.BR apt-get ,
+.BR apt-cache ,
+.BR gbp-pq ,
+.BR gbp-build ,
+or
+.BR mergechanges .
+Can be repeated as necessary.
+
+Use of this ability should not normally be necessary.
+It is provided for working around bugs,
+or other unusual situations.
+If you use these options,
+you may violate dgit's assumptions
+about the behaviour of its subprograms
+and cause lossage.
+
+For dpkg-buildpackage, dpkg-genchanges, mergechanges and sbuild,
+the option applies only when the program is invoked directly by dgit.
+Usually, for passing options to dpkg-genchanges, you should use
+.BR --ch: \fIoption\fR.
+
+Specifying --git is not effective for some lower-level read-only git
+operations performed by dgit, and also not when git is invoked by
+another program run by dgit.
+
+See notes below regarding ssh and dgit.
+
+NB that --gpg:option is not supported (because debsign does not
+have that facility).
+But see
+.B -k
+and the
+.B keyid
+distro config setting.
+.TP
+.RI \fB--curl=\fR program " | \fB--dput=\fR" program " |..."
+Specifies alternative programs to use instead of
+.BR curl ,
+.BR dput ,
+.BR debsign ,
+.BR dpkg-source ,
+.BR dpkg-buildpackage ,
+.BR dpkg-genchanges ,
+.BR sbuild ,
+.BR gpg ,
+.BR ssh ,
+.BR dgit ,
+.BR apt-get ,
+.BR apt-cache ,
+.BR git ,
+.BR gbp-pq ,
+.BR gbp-build ,
+or
+.BR mergechanges .
+
+For
+.BR dpkg-buildpackage ,
+.BR dpkg-genchanges ,
+.B mergechanges
+and
+.BR sbuild ,
+this applies only when the program is invoked directly by dgit.
+
+For
+.BR dgit ,
+specifies the command to run on the remote host when dgit
+rpush needs to invoke a remote copy of itself. (dgit also reinvokes
+itself as the EDITOR for dpkg-source --commit; this is done using
+argv[0], and is not affected by --dgit=).
+
+.BR gbp-build 's
+value
+is used instead of gbp build or git-buildpackage. (The default is
+the latter unless the former exists on PATH.)
+.BR gbp-pq 's
+value
+is used instead of gbp pq.
+In both cases,
+unusually, the specified value is split on whitespace
+to produce a command and possibly some options and/or arguments.
+
+For
+.BR ssh ,
+the default value is taken from the
+.B DGIT_SSH
+or
+.B GIT_SSH
+environment variables, if set (see below). And, for ssh, when accessing the
+archive and dgit-repos, this command line setting is overridden by the
+git config variables
+.BI dgit-distro. distro .ssh
+and
+.B .dgit.default.ssh
+(which can in turn be overridden with -c). Also, when dgit is using
+git to access dgit-repos, only git's idea of what ssh to use (eg,
+.BR GIT_SSH )
+is relevant.
+.TP
+.BI --existing-package= package
+dgit push needs to canonicalise the suite name. Sometimes, dgit
+lacks a way to ask the archive to do this without knowing the
+name of an existing package. Without --new we can just use the
+package we are trying to push. But with --new that will not work, so
+we guess
+.B dpkg
+or use the value of this option. This option is not needed with the
+default mechanisms for accessing the archive.
+.TP
+.BR -h | --help
+Print a usage summary.
+.TP
+.BI --initiator-tempdir= directory
+dgit rpush uses a temporary directory on the invoking (signing) host.
+This option causes dgit to use
+.I directory
+instead. Furthermore, the specified directory will be emptied,
+removed and recreated before dgit starts, rather than removed
+after dgit finishes. The directory specified must be an absolute
+pathname.
+.TP
+.BI --force- something
+Instructs dgit to try to proceed despite detecting
+what it thinks is going to be a fatal problem.
+.B This is probably not going to work.
+These options are provided as an escape hatch,
+in case dgit is confused.
+(They might also be useful for testing error cases.)
+.TP
+.B --import-dsc-with-dgit-field
+Tell dgit import-dsc to treat a .dsc with a Dgit field
+like one without it.
+The result is a fresh import,
+discarding the git history
+that the person who pushed that .dsc was working with.
+.TP
+.B --force-unrepresentable
+Carry on even if
+dgit thinks that your git tree contains changes
+(relative to your .orig tarballs)
+which dpkg-source is not able to represent.
+Your build or push will probably fail later.
+.TP
+.B --force-changes-origs-exactly
+Use the set of .origs specified in your .changes, exactly,
+without regard to what is in the archive already.
+The archive may well reject your upload.
+.TP
+.B --force-unsupported-source-format
+Carry on despite dgit not understanding your source package format.
+dgit will probably mishandle it.
+.TP
+.B --force-dsc-changes-mismatch
+Do not check whether .dsc and .changes match.
+The archive will probably reject your upload.
+.TP
+.BR --force-import-gitapply-absurd " | " --force-import-gitapply-no-absurd
+Force on or off the use of the absurd git-apply emulation
+when running gbp pq import
+when importing a package from a .dsc.
+See Debian bug #841867.