Version v0.0.0 as indicated in initial ITP is obsolete. As discussed on #debian-mentors IRC, continuing with the same ITP bug should be OK. Packaging data was moved to salsa, gbp seems to work without problems. To build and review the package, following commands work:
gbp clone --debian-branch debian/sid --upstream-branch upstream https://salsa.debian.org/halfdog-guest/guerillabackup.git cd guerillabackup git config user.email "your mail" git config user.name "your name" git checkout debian/sid gbp buildpackage --git-pbuilder --git-pbuilder-options=--source-only-changes --unsigned-source --unsigned-changes