GitLab

prodcommit uses git describe to make a human-friendly name for before and after revisions of submodules. Usually this simply resolves to a corresponding tag name, however occasionally the revision is not tagged, and git describe makes up a name that includes the short commit hash of the revision, as well as the tag of the nearest ancestor of the revision that has one.

However, it turns out that length of any short commit hash generated by git describe is (a) subject to a per-user override using git config, and (b) defaults to 7 characters, which contrasts to the 8 used by GitLab.

To allow for easy cross-referencing against GitLab, change prodcomit so that it forces git describe to use 8-character short commit hashes.