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列出远程仓库 URL

$ git remote -v

List the current remotes （列出当前远程仓库）

origin https://github.com/user/repo.git (fetch)

origin https://github.com/user/repo.git (push)

添加上游仓库URL

$ git remote add upstream https://github.com/otheruser/repo.git

Set a new remote (设置一个新的远程仓库)

再次列出远程仓库 URL

$ git remote -v

Verify new remote (验证新的原唱仓库)

origin https://github.com/user/repo.git (fetch)

origin https://github.com/user/repo.git (push)

upstream https://github.com/otheruser/repo.git (fetch)

upstream https://github.com/otheruser/repo.git (push)

获取上游代码

$ git fetch upstream

检查你的 fork’s 本地 master 分支，如果不在master 分支就切换到该分支

$ git checkout master

Switched to branch ‘master’

合并来自 upstream/master 的更改到本地 master 分支上。

$ git merge upstream/master