$ git clone -n https://src.fedoraproject.org/rpms/nauty.git /var/lib/mock/f41-build-856682-167743/root/chroot_tmpdir/scmroot/nauty
Cloning into '/var/lib/mock/f41-build-856682-167743/root/chroot_tmpdir/scmroot/nauty'...
$ git fetch origin 679ec5f4a436b558f956907a65ca994b4e7c00a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nauty
 * [new ref]         679ec5f4a436b558f956907a65ca994b4e7c00a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 679ec5f Version 2.8.9