$ git clone -n https://src.fedoraproject.org/rpms/kf6-karchive.git /var/lib/mock/f42-build-862105-170665/root/chroot_tmpdir/scmroot/kf6-karchive
Cloning into '/var/lib/mock/f42-build-862105-170665/root/chroot_tmpdir/scmroot/kf6-karchive'...
$ git fetch origin f12b76f77455e32d752e225a68c263384bd6f121:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-karchive
 * [new ref]         f12b76f77455e32d752e225a68c263384bd6f121 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f12b76f 6.8.0