$ git clone -n https://src.fedoraproject.org/rpms/python-matplotlib.git /var/lib/mock/f38-build-side-42-init-devel-687436-26760/root/chroot_tmpdir/scmroot/python-matplotlib
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-687436-26760/root/chroot_tmpdir/scmroot/python-matplotlib'...
$ git fetch origin a567434c0d64364e205f11fe2d241860452a34b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-matplotlib
 * [new ref]         a567434c0d64364e205f11fe2d241860452a34b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a567434 Update to latest version (#2164642)