Github 报错 kex_exchange_identification: Connection closed by remote host

github 报错：

$ git fetch --prune --all --verbose
 
Fetching origin
kex_exchange_identification: Connection closed by remote host
Connection closed by 198.18.0.114 port 22
fatal: Could not read from remote repository.
 
Please make sure you have the correct access rights
and the repository exists.

方法一：用https，把repo的url改成http方式。

方法二：坚持使用SSH方式，在 {用户}/.ssh/ 目录下建立config文本文档，输入以下代码，端口指向443即可。

Host github.com
Hostname ssh.github.com
Port 443