I've been experimenting with the Salsa CI pipeline in a pure-git based workflow and I found that (at least in this example package where I'm using git-debrebase too) it fails, apparently because I don't have an `upstream/1.2.3` tag. I'm not importing any upstream tarballs into git. I want it to use the `v1.2.3` tag instead. I found that I could achieve this by prepending a prepare script to the build jobs, which runs `git-deborig`. That seems to satisfy whatever in the default pipeline is trying to make an orig with gbp. But surely that can't be the best way. Can you advise?