fix: Configure a fallback git committer for clones and fetches

[notheotherben]

This should resolve the following error when attempting to clone a repository on a system which lacks a globally configured Git user.name and user.email.

Oh no! Unable to fetch from remote git repository 'https://github.com/your/repo.git'

This was caused by:

• Failed to update references to their new position to match their remote locations
• The reflog could not be created or updated
• reflog messages need a committer which isn't set

To try and fix this, you can:

• Make sure that the repository is available and correctly configured.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.27%. Comparing base (6dfa73e) to head (461b833).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #122      +/-   ##
==========================================
+ Coverage   70.03%   70.27%   +0.23%     
==========================================
  Files          24       24              
  Lines        2263     2281      +18     
==========================================
+ Hits         1585     1603      +18     
  Misses        678      678              

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