Catch OSError to handle gevent monkey patching errors

Author: aethanol

git/cmd.py

@@ -546,7 +546,7 @@ def read_all_from_possibly_closed_stream(stream: Union[IO[bytes], None]) -> byte
                 if stream:
                     try:
                         return stderr_b + force_bytes(stream.read())
-                    except ValueError:
+                    except (OSError, ValueError):
                         return stderr_b or b""
                 else:
                     return stderr_b or b""