centos up-to-date git

目前发现最clean的方式

sudo yum install epel-release
sudo yum install https://centos6.iuscommunity.org/ius-release.rpm
sudo yum install git2u
sudo yum remove git
sudo yum install epel-release 
sudo yum install https://centos7.iuscommunity.org/ius-release.rpm
sudo yum install git2u