1. Correspondence of git fetch origin 取远程的变更即可。或者 git pull 取当前分支的更新的同时会把其它分支也拖回来的。除非 clone 的时候用了 -b 选项。你也可以用 git fetch origin develop 来指定。git fetch 是 git push.
2. You are too lazy. man git-push You can see the answer (well, even though I didn’t know it before):

--all
Instead of naming each ref to push, specifies that all refs under refs/heads/ be pushed.

• If you only want to synchronize the remote repository to the local one:

$ git fetch origin

• If you want to pull down certain content in the remote branch after completing the synchronization of the remote repository. Think about it carefully, git pull就是分为git fetch和git mergeIt is implemented by two commands, the former operates the repository, and the latter affects local files through the repository. Well, you can

$ git checkout -b localbranch
$ git pull origin remotebranch:localbranch // 当本地分支和远程分支名称相同时，只写一个就可以
// 这种方法适合pull指定分支

• You need to push all local branches to the remote end

$ git push -all

Understand git pull = fetch + merge, then question 3 cannot be done, because merge may have conflicts and can only operate one branch.

I also hate English manuals, they are hard to read. . .