$ git clone -n https://src.fedoraproject.org/rpms/reportd.git /var/lib/mock/f41-build-side-1-2768913-32100/root/chroot_tmpdir/scmroot/reportd
Cloning into '/var/lib/mock/f41-build-side-1-2768913-32100/root/chroot_tmpdir/scmroot/reportd'...
$ git fetch origin 4c4edc2a2c5349db392e17b4e2b70dd7e43087cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/reportd
 * [new ref]         4c4edc2a2c5349db392e17b4e2b70dd7e43087cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c4edc2 Orphaned for 6+ weeks