Debian tag2upload has been in development for a while as a new way to carry out source-only uploads using a signed Git tag . The focus with tag2upload is on making it easier to take care of Debian packaging work using simply a signed Git tag for those wanting to pursue this workflow. The git-debpush command is a wrapper around git-tag and git-push for pushing a tagged Git commit to a Debian-style archive.
Debian tag2upload is now considered to be in "open beta" for Debian developers for those wanting to cautiously use it -- and ideally pushing to Debian Experimental first. There are some features not supported yet like pushing to new or security-master.
Those wanting to learn about tag2upload in general can do so via the Debian Wiki page . More details on tag2upload now being in open beta via this morning's announcement .