解决：
git pull origin master --allow-unrelated-histories
全篇完！
https://www.centos.bz/2018/03/git-%E5%87%BA%E7%8E%B0-fatal-refusing-to-merge-unrelated-histories-%E9%94%99%E8%AF%AF/
标签：Git,git,refusing,histories,merge,unrelated,fatal
来源： https://blog.csdn.net/qq_33733970/article/details/99744493