$ git clone -n https://src.fedoraproject.org/rpms/group-service.git /var/lib/mock/f39-build-1520103-35825/root/chroot_tmpdir/scmroot/group-service
Cloning into '/var/lib/mock/f39-build-1520103-35825/root/chroot_tmpdir/scmroot/group-service'...
$ git fetch origin 91e090a36282c71feb476c33aef8a1bc90362006:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/group-service
 * [new ref]         91e090a36282c71feb476c33aef8a1bc90362006 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91e090a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild