在Windows使用Git客户端访问github，执行pull或push时，报不能访问SSL相关的错误：
fatal: unable to access 'https://github.com/xxxx/xxx.git/': error:1407742E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version
在网上查找了一下原因，这个应该是和Github最近移除弱密码标准工作相关。参考：https://githubengineering.com/crypto-removal-notice/，通告移除的协议内容如下：
- TLSv1/TLSv1.1: This applies to all HTTPS connections, including web, API, and git connections to https://github.com and https://api.github.com.
- diffie-hellman-group1-sha1: This applies to all SSH connections to github.com
- diffie-hellman-group14-sha1: This applies to all SSH connections to github.com
以下客户端会不兼容：
- Git-Credential-Manager-for-Windows < v1.14.0
- Git on Red Hat 5, < 6.8, and < 7.2
- Java releases < JDK 8
- Visual Studio：最新版已经兼容
解决方法
升级git到最新版本，目前最新版本为2.16.2。下载地址：https://git-scm.com/download/win