$ git clone -n https://src.fedoraproject.org/rpms/python-mapnik.git /var/lib/mock/f41-build-851344-165914/root/chroot_tmpdir/scmroot/python-mapnik
Cloning into '/var/lib/mock/f41-build-851344-165914/root/chroot_tmpdir/scmroot/python-mapnik'...
$ git fetch origin de9f95e70a9599351e086bc81e32c833f1493d6d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mapnik
 * [new ref]         de9f95e70a9599351e086bc81e32c833f1493d6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de9f95e Rebuild for mapnik 4.0.1