We've recently started a rawhide "mechanical" stream of Fedora CoreOS
(mechanical streams are streams that are meant for developers and that
don't use RPM lockfiles). You can see the first build here:
https://builds.coreos.fedoraproject.org/browser?stream=rawhide
This will allow us to more easily track breaking changes in rawhide
and work with maintainers and upstreams to resolve them earlier in the
process. (Yes, this is long overdue -- better late than never!)
Cheers!
Jonathan