$ git clone -n https://src.fedoraproject.org/rpms/s390utils.git /var/lib/mock/f39-build-1512318-35564/root/chroot_tmpdir/scmroot/s390utils
Cloning into '/var/lib/mock/f39-build-1512318-35564/root/chroot_tmpdir/scmroot/s390utils'...
$ git fetch origin 702b044c209f5f16b46a0b3cd9405ea3ee2e5d3a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/s390utils
 * [new ref]         702b044c209f5f16b46a0b3cd9405ea3ee2e5d3a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 702b044 Enable rust based tools