$ git clone -n https://src.fedoraproject.org/rpms/kf6-kfilemetadata.git /var/lib/mock/f41-build-815469-149534/root/chroot_tmpdir/scmroot/kf6-kfilemetadata
Cloning into '/var/lib/mock/f41-build-815469-149534/root/chroot_tmpdir/scmroot/kf6-kfilemetadata'...
$ git fetch origin fa8f5f8cc39d3c00c5bae2c129d2fcabeb128555:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kfilemetadata
 * [new ref]         fa8f5f8cc39d3c00c5bae2c129d2fcabeb128555 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa8f5f8 6.4.0