git: update check for invalid URL characters to work with Python versions that include an attempt at fixing the very same problem With changes like https://github.com/python/cpython/commit/76cd81d60310d65d01f9d7b48a8985d8ab89c8b4 making it to Python 3.10 and being backported to previous Python versions, the approach in a8a51a3bdb61 no longer works when combined with urllib.parse.urlparse in d2f59de17bef: path will never contain the invalid characters. To catch this case anyway, add a new check to verify that the parsed URL can roundtrip back to the original representation with urllib.parse.urlunparse . The actual exception might vary, but one of them should always fire. There is a risk that the new check will reject some URLs that somehow isn't normalized. No such cases have been found yet.