Description of problem: python-tooz is not used by any other package in Fedora. In an effort to reduce the number of packages maintained by openstack-sig team, this package can be retired from Fedora rawhide.
https://src.fedoraproject.org/rpms/python-tooz/c/4a81d7f68182d361b067e03e5ea46d01788f45b3?branch=master
python-tooz is not present in F30.