$ git clone -n https://src.fedoraproject.org/rpms/libgrss.git /var/lib/mock/f40-build-741540-110242/root/chroot_tmpdir/scmroot/libgrss
Cloning into '/var/lib/mock/f40-build-741540-110242/root/chroot_tmpdir/scmroot/libgrss'...
$ git fetch origin 6d04cb5085488f9318386ad7f1c54de9c5b521c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgrss
 * [new ref]         6d04cb5085488f9318386ad7f1c54de9c5b521c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d04cb5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild