I wonder if it is safe, if it is ever done, to rename a commit message? -- help.github.com/en/github/committi...
One more wonder, is, how often should I commit?
It depends if someone or something depend on this commit identifier. Amending a commit and push force it will change the commit identifier.
In my opinion you should commit as often as possible. It will help you split your code 👌 Keep in mind you must commit only working things. The first four points in the following article git-tower.com/blog/version-control... describe well what is a good commit 👍
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