$ git clone -n https://src.fedoraproject.org/rpms/python-git-changelog.git /var/lib/mock/f39-build-1643977-40254/root/chroot_tmpdir/scmroot/python-git-changelog
Cloning into '/var/lib/mock/f39-build-1643977-40254/root/chroot_tmpdir/scmroot/python-git-changelog'...
$ git fetch origin 90a808cb84656449420ea4e5a883bc9ea883cce5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-git-changelog
 * [new ref]         90a808cb84656449420ea4e5a883bc9ea883cce5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90a808c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild