$ git clone -n https://src.fedoraproject.org/rpms/ignition.git /var/lib/mock/f42-build-side-1-3585618-46906/root/chroot_tmpdir/scmroot/ignition
Cloning into '/var/lib/mock/f42-build-side-1-3585618-46906/root/chroot_tmpdir/scmroot/ignition'...
$ git fetch origin 8c802480f9dbc1ad88dd25a796b0e7b0efb66323:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ignition
 * [new ref]         8c802480f9dbc1ad88dd25a796b0e7b0efb66323 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c80248 Update to 2.22.0