$ git clone -n https://src.fedoraproject.org/rpms/x2goserver.git /var/lib/mock/f40-build-2045377-48791/root/chroot_tmpdir/scmroot/x2goserver
Cloning into '/var/lib/mock/f40-build-2045377-48791/root/chroot_tmpdir/scmroot/x2goserver'...
$ git fetch origin 809ada9fcdfbd43deffe00a20f17af04e3990357:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/x2goserver
 * [new ref]         809ada9fcdfbd43deffe00a20f17af04e3990357 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 809ada9 Fix typo in description (bz#2251291)