See https://src.fedoraproject.org/rpms/python-tox/pull-request/167
Fedora CI - installability failure Package tests for 9a5726b9: failed
https://artifacts.dev.testing-farm.io/50f4f531-59cf-4db6-a8b5-ac5e24c069db/
CentOS Stream 10 - BaseOS 42 MB/s | 6.2 MB 00:00 CentOS Stream 10 - AppStream 17 MB/s | 2.2 MB 00:00 CentOS Stream 10 - Extras packages 25 kB/s | 3.3 kB 00:00 Error: Problem: conflicting requests - nothing provides python3.12dist(cachetools) needed by tox-4.23.2-1.el10_0.noarch from brew-125955120 - nothing provides python3.12dist(filelock) needed by tox-4.23.2-1.el10_0.noarch from brew-125955120 - nothing provides python3.12dist(platformdirs) needed by tox-4.23.2-1.el10_0.noarch from brew-125955120 - nothing provides python3.12dist(pyproject-api) needed by tox-4.23.2-1.el10_0.noarch from brew-125955120 - nothing provides python3.12dist(chardet) >= 5.2 needed by tox-4.23.2-1.el10_0.noarch from brew-125955120 - nothing provides python3.12dist(virtualenv) >= 20 needed by tox-4.23.2-1.el10_0.noarch from brew-125955120
The packages are available in EPEL. This looks like plan c10s without EPEL enabled.