error: failed to push some refs to 'https://github.com/Qtoken/......'
1. 问题描述：执行命令：git push origin master 将git仓库项目 添加到github非空仓库报错
2.返回内容：
error: failed to push some refs to 'https://github.com/Qtoken/......'
hint: Updates were rejected because the remote contains work that you do
hint: not have locally. This is usually caused by another repository pushing
hint: to the same ref. You may want to first integrate the remote changes
hint: (e.g., 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
3.原因： git仓库与远程连接的github库，内容不一致
4.解决方法：
4.1 执行 git pull --rebase origin master 将github仓库内容同步到git仓库
4.2 再执行git push origin master 此时git仓库项目正常 添加到github非空仓库