背景

目前最新的Git（https://git-scm.com/）已经支持main分支了。

本地当前分支为master，远程仓库为main，且远程仓库与本地仓库有 unrelated histories这样的问题，如远程仓库有README.md但本地没有

steps

git checkout -b main
# Switched to a new branch 'main'
git branch
# * main
#  master
git merge master # 将master分支合并到main上
# Already up to date.
git pull origin main --allow-unrelated-histories # git pull origin main会报错：refusing to merge unrelated histories
git push origin main

完成合并.