Mac升级Sierra , git无法正常使用diffie-he

Unable to negotiate with xxxxxx port 29418~~: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
fatal: Could not read from remote repository.

fix：

1. sudo vim /etc/ssh/ssh_config

2. 添加如下到文件底部
   Host *
   KexAlgorithms +diffie-hellman-group1-sha1

3. 重启command再试