git 如何 fork 一个仓库的所有分支

假设要fork的仓库名称为a，你的本地仓库名称为b

1. 克隆a仓库的ssh

git clone git@github.com:username/a.git

cd a

2. 添加b仓库为上游(upstream)远程仓库

git remote add upstream git@github.com:username/b.git

3. 获取所有分支

git fetch upstream

4. 查看所有分支

git branch -r

5. 创建本地分支以跟踪远程分支

for branch in $(git branch -r | grep 'upstream/' | grep -v 'upstream/HEAD' | sed 's/upstream\///'); do
  git checkout -b $branch upstream/$branch
done

6. 推送所有分支到b

for branch in $(git branch -r | grep 'upstream/' | grep -v 'upstream/HEAD' | sed 's/upstream\///'); do
  git push origin $branch
done