Solve Github SSH git push error remote: fatal error in commit_refs

After GitHub configures SSH git push, an error is reported:

remote: fatal error in commit_refs

There are almost no solutions found online. After my own exploration, I finally found a solution.

The solution: very brutal.

1. Enter the git warehouse and execute

rm -rf .git

2.

rm -rf ~/.ssh

3.

ssh-add -D

4. Reinstall git (optional)

5. Reconfigure SSH login, that's it.