$ git clone -n https://src.fedoraproject.org/rpms/facter.git /var/lib/mock/f41-build-side-1-2635097-26094/root/chroot_tmpdir/scmroot/facter
Cloning into '/var/lib/mock/f41-build-side-1-2635097-26094/root/chroot_tmpdir/scmroot/facter'...
$ git fetch origin d5c60919974d9c4679e6c40c690399b337e158c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/facter
 * [new ref]         d5c60919974d9c4679e6c40c690399b337e158c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d5c6091 Update to 4.8.0 (fixes rhbz#2274554)