There are cases where "gbp import-orig --uscan" exits with a no-op
although a new upstream version should be available:
- a new repack level in d/watch;
- new subcomponents in d/watch;

In both cases, the new "upstream" part of the version number is
actually increased (either with +dfsgX or +~csX.Y.Z if using
subcomponents), but to get there you have to perform the ugly trick of
setting the latest version number in d/changelog to 0, then running
gbp import-orig --uscan, then changing the version number back to its
previous value.

I think a "gbp import-orig --uscan --force" option would be a nice
addition; it should be a simple matter of running uscan with -ddd.

Thanks,

Roland.