$ git clone -n https://src.fedoraproject.org/rpms/irrlicht.git /var/lib/mock/f41-build-785966-13590/root/chroot_tmpdir/scmroot/irrlicht
Cloning into '/var/lib/mock/f41-build-785966-13590/root/chroot_tmpdir/scmroot/irrlicht'...
$ git fetch origin 27af749c3f611017f03f8d8273616cd1b82b6672:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/irrlicht
 * [new ref]         27af749c3f611017f03f8d8273616cd1b82b6672 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27af749 Eliminate use of obsolete %patchN syntax (#2283636)