$ git clone -n https://src.fedoraproject.org/rpms/grafana.git /var/lib/mock/f42-build-61101799-6588810/root/chroot_tmpdir/scmroot/grafana
Cloning into '/var/lib/mock/f42-build-61101799-6588810/root/chroot_tmpdir/scmroot/grafana'...
$ git fetch origin 2d4bd8e98d18461c18a0054e8e57da0563c3f4e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/grafana
 * [new ref]         2d4bd8e98d18461c18a0054e8e57da0563c3f4e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d4bd8e change sbin to bin in grafana-selinux