fatal: Not a git repository (or any of the parent directories): .git

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创建并切换分支到dev

git checkout -b dev

运行时出现如下错误：

fatal: Not a git repository (or any of the parent directories): .git

解决方法： 

执行以下命令行 ： git init

接着执行：git status

再执行：git checkout -b dev

问题解决！！！