xxxx@LAPTOP-LQF2J8H0 MINGW64 /d/Users/xxx/venv/program (master)
$ git clone https://github.com/XXX/program.
git Cloning into 'program'... remote: Enumerating objects: 1417, done.
remote: Counting objects: 100% (1417/1417), done.
remote: Compressing objects: 100% (945/945), done.
fatal: --stdin requires a git repository
fatal: index-pack failed
报错原因是当前文件夹并非git目录，在当前目录下进行设置后即可clone project
执行以下命令：
$ git config user.email "your email address"
$ git config user.name "username"
执行完成后，执行clone命令：
$ git clone https://github.com/XXXX/program.git
Cloning into 'program'...
remote: Enumerating objects: 1417, done.
remote: Counting objects: 100% (1417/1417), done.
remote: Compressing objects: 100% (945/945), done.
Receiving objects: 13% (191/1417), 308.00 KiB | 8.00 KiB/s