$ git clone -n https://src.fedoraproject.org/rpms/facter.git /var/lib/mock/f42-build-side-1-3501727-45976/root/chroot_tmpdir/scmroot/facter
Cloning into '/var/lib/mock/f42-build-side-1-3501727-45976/root/chroot_tmpdir/scmroot/facter'...
$ git fetch origin 066dfadc8a513f01efc8cae5a6d6427d3f58d5c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/facter
 * [new ref]         066dfadc8a513f01efc8cae5a6d6427d3f58d5c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 066dfad Add packit configuration