$ git clone -n https://src.fedoraproject.org/rpms/graphviz.git /var/lib/mock/f41-build-812471-147913/root/chroot_tmpdir/scmroot/graphviz
Cloning into '/var/lib/mock/f41-build-812471-147913/root/chroot_tmpdir/scmroot/graphviz'...
$ git fetch origin fad67b32e32e8a4e18e9326646d26dd77c5c180e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/graphviz
 * [new ref]         fad67b32e32e8a4e18e9326646d26dd77c5c180e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fad67b3 Fix redundant declaration of aghtmlstr