Fix remote-update parsing issue when updating shallow submodules

The line that now parses correctly looks like:

```
=5 = [up to date] zm/160_uwp -> origin/zm/160_uwp
```

Note the `=5 ` in the example, which is now ignored.

git/remote.py

@@ -316,7 +316,7 @@ class FetchInfo(IterableObj):
         ERROR,
     ) = [1 << x for x in range(8)]
 
-    _re_fetch_result = re.compile(r"^ *(.) (\[[\w \.$@]+\]|[\w\.$@]+) +(.+) -> ([^ ]+)(    \(.*\)?$)?")
+    _re_fetch_result = re.compile(r"^ *(?:.{0,3})(.) (\[[\w \.$@]+\]|[\w\.$@]+) +(.+) -> ([^ ]+)(    \(.*\)?$)?")
 
     _flag_map: Dict[flagKeyLiteral, int] = {
         "!": ERROR,