$ git clone -n https://src.fedoraproject.org/rpms/group-service.git /var/lib/mock/f40-build-2290124-55950/root/chroot_tmpdir/scmroot/group-service
Cloning into '/var/lib/mock/f40-build-2290124-55950/root/chroot_tmpdir/scmroot/group-service'...
$ git fetch origin 840cb96cfaa12258bebf75888270073223e65989:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/group-service
 * [new ref]         840cb96cfaa12258bebf75888270073223e65989 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 840cb96 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild