解决方案如下：
1.切换到自己项目所在的目录，右键选择GIT BASH Here，Idea中可使用Alt+F12 打开终端
2.在terminl窗口中依次输入命令：
git pull
git pull origin master
git pull origin master --allow-unrelated-histories
3.在idea中重新push自己的项目，成功！！！
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