suggestion: retry push logic

[dongho-jung]

If you run two add-and-commit actions almost simultaneously, you could get following error.

Error: Error: To https://github.com/foo/bar
!	refs/heads/main:refs/heads/main	[remote rejected] (cannot lock ref 'refs/heads/main': is at a0d18c45d2641f53c5fbc5fee82a79c506443bbc but expected 4826ed03d4ae9264964fd6e2c9df73cbf9413b92)
Done

Even though you use pull: rebase --auto-stash option this could happen.

This case is quite rare but can happen indeed.

So I suggest some retry logic for this case.

If it's acceptable I can PR too

[dongho-jung]

sorry it was duplicate issue #321