$ git clone -n https://src.fedoraproject.org/rpms/xmvn.git /var/lib/mock/f40-build-2429121-60604/root/chroot_tmpdir/scmroot/xmvn
Cloning into '/var/lib/mock/f40-build-2429121-60604/root/chroot_tmpdir/scmroot/xmvn'...
$ git fetch origin c0e8b271846e2ce700e1a4e08b894385c66acebc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmvn
 * [new ref]         c0e8b271846e2ce700e1a4e08b894385c66acebc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0e8b27 Implement basic smoke test