Git 无法clone 课程的repository

试过了https和ssh方法都不行。

https 输入用户名和密码之后一直卡住。

> git clone https://git.imooc.com/class-102/bigdata_course_materials.git
Cloning into 'bigdata_course_materials'...
Username for 'https://git.imooc.com': cutesnoopy
Password for 'https://cutesnoopy@git.imooc.com':

用ssh方法显示没有权限：

 > git clone ssh://git@git.imooc.com:80/class-102/bigdata_course_materials.git
Cloning into 'bigdata_course_materials'...
git@git.imooc.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

麻烦帮我看下，是不是我的权限没弄好。