$ git clone -n https://src.fedoraproject.org/rpms/python-niaarm.git /var/lib/mock/f40-build-2496405-61664/root/chroot_tmpdir/scmroot/python-niaarm
Cloning into '/var/lib/mock/f40-build-2496405-61664/root/chroot_tmpdir/scmroot/python-niaarm'...
$ git fetch origin ea8bb77207388fb95c599b47c02baa563c405e12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-niaarm
 * [new ref]         ea8bb77207388fb95c599b47c02baa563c405e12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea8bb77 Update to 0.3.7