Это старая версия документа!
https://stackoverflow.com/questions/17577409/git-remove-merge-commit-from-history
GIT_AUTHOR_DATE=«2020-10-24T18:00:00 +0200» GIT_COMMITTER_DATE=$GIT_AUTHOR_DATE git commit
https://levelup.gitconnected.com/how-to-commit-multiline-messages-in-git-commit-bcd76f81919c