git branch
git建分支的时候,可以指定源自哪个版本 默认是从当前的HEAD git branch test 可以从某次提交 git branch test 2571682 从某个分支的HEAD git branch test dev <start-point> The new branch head will point to this commit. It may be given as a branch name, a commit-id, or a tag. If this option is omitted, the current HEAD will be used instead.