going back to a certain commit
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 There are many ways to do this.  If I were on master , the way I'd do it is as follows:  
git branch safety to keep a branch at the old HEAD  git reset --hard abc123 to move master back to the old commit, assuming that commit was abc123  git branch -D safety to discard the safety branch, if desired  上一篇: 重置Git分支到上次提交? 轨道
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