python-urllib3 fails to build with Python 3.12.0a7.

=================================== FAILURES ===================================
______________ SingleTLSLayerTestCase.test_ssl_object_attributes _______________

self = <test.test_ssltransport.SingleTLSLayerTestCase object at 0x7f88718bf020>

    @pytest.mark.timeout(PER_TEST_TIMEOUT)
    def test_ssl_object_attributes(self):
        """Ensures common ssl attributes are exposed"""
        self.start_dummy_server()
    
        sock = socket.create_connection((self.host, self.port))
        with SSLTransport(
            sock, self.client_context, server_hostname="localhost"
        ) as ssock:
            cipher = ssock.cipher()
            assert type(cipher) == tuple
    
            # No chosen protocol through ALPN or NPN.
            assert ssock.selected_alpn_protocol() is None
            assert ssock.selected_npn_protocol() is None
    
            shared_ciphers = ssock.shared_ciphers()
>           assert type(shared_ciphers) == list
E           AssertionError: assert <class 'NoneType'> == list
E            +  where <class 'NoneType'> = type(None)

test/test_ssltransport.py:205: AssertionError

=========================== short test summary info ============================
FAILED test/test_ssltransport.py::SingleTLSLayerTestCase::test_ssl_object_attributes
=========== 1 failed, 721 passed, 8 skipped, 1572 warnings in 16.50s ===========

https://docs.python.org/3.12/whatsnew/3.12.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.12/fedora-rawhide-x86_64/05918287-python-urllib3/

For all our attempts to build python-urllib3 with Python 3.12, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.12/package/python-urllib3/

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 3.12:
https://copr.fedorainfracloud.org/coprs/g/python/python3.12/

Let us know here if you have any questions.

Python 3.12 is planned to be included in Fedora 39. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.12.
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.