Tags 985775 +sid thanks Git changed the gitexecdir directory. Said change is currently blocked from migrating to testing by bug 985416 which was cloned from bug 985351, ongoing discussion of the issue seems to be in bug 985351.
Given where we are in the release process, that there still seems to be ongoing discussion on the git side as to how best to deal with this issue and that this doesn't currently affect bullseye, I think we should probably wait for a direct request from the git maintainers before changing anything on the git-absorb side.