Hello,
I've just released the new mock-core-configs package:
https://github.com/rpm-software-management/mock/releases/tag/mock-core-co...
Updates are in Bodhi.
The new package ships Fedora 35 configuration; and since we seem to already
have the composes available - I deployed the new configs to Fedora Copr and
enabled the Fedora 35 chroots (prepared by Jakub Kadlčík).
This update should also fix the recent Fedora Rawhide build failures,
sorry for the delay.
Pavel