配置 upstream

# 查看远程仓库
git remote -v
# 以 `ant-design-vue` 示例
git remote add upstream https://github.com/vueComponent/ant-design-vue.git
git remote -v # 验证

同步 upstream

git fetch upstream # fetch
git merge upstream/master # merge

推送

git push

最后前往 github 验证即可。