$ git clone -n https://src.fedoraproject.org/rpms/python-pygraphviz.git /var/lib/mock/f40-build-2477145-61597/root/chroot_tmpdir/scmroot/python-pygraphviz
Cloning into '/var/lib/mock/f40-build-2477145-61597/root/chroot_tmpdir/scmroot/python-pygraphviz'...
$ git fetch origin 3099e9cf68fe2c0ad850bed6d81d705b79806fe1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pygraphviz
 * [new ref]         3099e9cf68fe2c0ad850bed6d81d705b79806fe1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3099e9c Add missing BR python3dist(matplotlib)