$ git clone -n https://src.fedoraproject.org/rpms/xmvn.git /var/lib/mock/f41-build-2044697-25295/root/chroot_tmpdir/scmroot/xmvn
Cloning into '/var/lib/mock/f41-build-2044697-25295/root/chroot_tmpdir/scmroot/xmvn'...
$ git fetch origin bb2752bd7a8f7edfae98a4e20b21f1d8b33bad79:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmvn
 * [new ref]         bb2752bd7a8f7edfae98a4e20b21f1d8b33bad79 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb2752b Remove obsolete build script