忘了从哪里弄来的，安装新版git的利器：
- #安装Git
- yum install -y epel-release
- rpm -ivh https://centos6.iuscommunity.org/ius-release.rpm
- yum list git2u
- yum install -y git2u
- git --version
可以说是见到过的最简单的办法了
如果是CentOS7，记得更改rpm :
- rpm -ivh https://centos7.iuscommunity.org/ius-release.rpm
