fail2ban fails to build with Python 3.10.0a5.

Traceback (most recent call last):
  File "/builddir/build/BUILD/fail2ban-0.11.2/bin/fail2ban-testcases", line 61, in <module>
    tests = gatherTests(regexps, opts)
  File "./fail2ban/tests/utils.py", line 381, in gatherTests
    from . import clientreadertestcase
  File "./fail2ban/tests/clientreadertestcase.py", line 34, in <module>
    from ..client.jailreader import JailReader, extractOptions, splitWithOptions
  File "./fail2ban/client/jailreader.py", line 34, in <module>
    from .actionreader import ActionReader
  File "./fail2ban/client/actionreader.py", line 31, in <module>
    from ..server.action import CommandAction
  File "./fail2ban/server/action.py", line 33, in <module>
    from collections import MutableMapping
ImportError: cannot import name 'MutableMapping' from 'collections' (/usr/lib64/python3.10/collections/__init__.py)

bpo-37324: Remove deprecated aliases to Collections Abstract Base Classes
from the collections module.

https://docs.python.org/3.10/whatsnew/changelog.html#python-3-10-0-alpha-5

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.10/fedora-rawhide-x86_64/01951917-fail2ban/

For all our attempts to build fail2ban with Python 3.10, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/package/fail2ban/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.10:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.