See L</Establish the current branch's ffq-prev>, below.
Note that it is dangerous not to know whether you are
-dealing with a gbp patches-unappled branch containing quilt patches,
+dealing with a gbp patches-unapplied branch containing quilt patches,
or a git-debrebase interchange branch.
At worst,
using the wrong tool for the branch format might result in
for the previous upstream version in
git-debrebase new-upstream operations.
+=item --dgit=<program>
+
+Run <program>, instead of dgit from PATH,
+when invocation of dgit is necessary.
+This is provided mostly for the benefit of the test suite.
+
=item -D
Requests (more) debugging. May be repeated.