$ git clone -n https://src.fedoraproject.org/rpms/octave-statistics.git /var/lib/mock/f40-build-2481249-61631/root/chroot_tmpdir/scmroot/octave-statistics
Cloning into '/var/lib/mock/f40-build-2481249-61631/root/chroot_tmpdir/scmroot/octave-statistics'...
$ git fetch origin 4314473b31694f65a550ff39b6afa5ece12ee27e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-statistics
 * [new ref]         4314473b31694f65a550ff39b6afa5ece12ee27e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4314473 Update to 1.6.3