isolate git config in tests

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.37%. Comparing base (59b7af0) to head (ea7f0c7).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #449 +/- ## ======================================= Coverage 85.37% 85.37% ======================================= Files 19 19 Lines 2120 2120 ======================================= Hits 1810 1810 Misses 310 310 ```

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