I now believe this is a bug in Git because calling `git status` fixes
the problem.
1) Create a hard link to a file in a Git repo.
2) Call `git status`.
3) Call `git reset --hard`.
Without 2), Git severs the hard link. With 2), the hard link is preserved.
Reproduction steps ("Test script") and further info:
https://github.com/brave/brave-browser/issues/20316#issuecomment-1020054082
This occurs for me on Debian 10 & 11, as well as Git 2.30.2 and 2.20.1.
