This option is useful if you are the maintainer, and you have
incorporated NMU changes into your own git workflow in a way that
doesn't make your branch a fast forward from the NMU.
-It can also be useful when an intermediate upload was not done with dgit.
+It can also be useful when there was an upload made without dgit
+since the most recent upload made with dgit.
This option is also usually necessary
the first time a package is pushed with dgit push