Fix git version parsing issue

Author: sbidoul

news/12280.bugfix.rst

@@ -0,0 +1 @@
+Fix crash when the git version number contains something else than digits and dots.

src/pip/_internal/vcs/git.py

@@ -101,7 +101,7 @@ def get_git_version(self) -> Tuple[int, ...]:
         if not match:
             logger.warning("Can't parse git version: %s", version)
             return ()
-        return tuple(int(c) for c in match.groups())
+        return (int(match.group(1)), int(match.group(2)))
 
     @classmethod
     def get_current_branch(cls, location: str) -> Optional[str]:

tests/unit/test_vcs.py

@@ -598,6 +598,21 @@ def test_get_git_version() -> None:
     assert git_version >= (1, 0, 0)
 
 
+@pytest.mark.parametrize(
+    ("version", "expected"),
+    [
+        ("git version 2.17", (2, 17)),
+        ("git version 2.18.1", (2, 18)),
+        ("git version 2.35.GIT", (2, 35)),  # gh:12280
+        ("oh my git version 2.37.GIT", ()),  #  invalid version
+        ("git version 2.GIT", ()),  # invalid version
+    ],
+)
+def test_get_git_version_parser(version: str, expected: Tuple[int, int]) -> None:
+    with mock.patch("pip._internal.vcs.git.Git.run_command", return_value=version):
+        assert Git().get_git_version() == expected
+
+
 @pytest.mark.parametrize(
     "use_interactive,is_atty,expected",
     [