Git更新fork的项目到最新版本

# 1、查看远程的版本库地址
$ git remote -v
origin https://github.com/xkcoding/hutool.git (fetch) 
origin https://github.com/xkcoding/hutool.git (push)
# 2、添加原项目 git 地址到本地版本库
$ git remote add upstream https://github.com/looly/hutool.git
# 3、检查版本库是否添加成功
$ git remote -v
origin  https://github.com/xkcoding/hutool.git (fetch)
origin  https://github.com/xkcoding/hutool.git (push)
upstream        https://github.com/looly/hutool.git (fetch)
upstream        https://github.com/looly/hutool.git (push)
# 4、原项目更新内容同步到本地
$ git fetch upstream
# 5、查看本地分支
$ git branch -a 
* v4-master 
remotes/origin/HEAD -> origin/v4-master 
remotes/origin/v4-dev 
remotes/origin/v4-master 
remotes/upstream/v4-dev 
remotes/upstream/v4-master
# 6、同步更新内容到本地对应分支
$ git merge upstream/v4-master
# 7、提交更新内容到 fork 地址
git push