$ git clone -n https://src.fedoraproject.org/rpms/python-matplotlib.git /var/lib/mock/f40-build-1537096-23930/root/chroot_tmpdir/scmroot/python-matplotlib
Cloning into '/var/lib/mock/f40-build-1537096-23930/root/chroot_tmpdir/scmroot/python-matplotlib'...
$ git fetch origin 97d2c5437b44d705672c2ef22f60d95123ca7854:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-matplotlib
 * [new ref]         97d2c5437b44d705672c2ef22f60d95123ca7854 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 97d2c54 Update to latest version (#2273293)