$ git clone -n https://src.fedoraproject.org/rpms/python-mapnik.git /var/lib/mock/f40-build-800302-142892/root/chroot_tmpdir/scmroot/python-mapnik
Cloning into '/var/lib/mock/f40-build-800302-142892/root/chroot_tmpdir/scmroot/python-mapnik'...
$ git fetch origin b5a343379cb6c1b35ce3effa509104485745c231:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mapnik
 * [new ref]         b5a343379cb6c1b35ce3effa509104485745c231 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5a3433 Rebuild for ICU 74