安装依赖：
yum install curl yum install curl-devel yum install zlib-devel yum install openssl-devel yum install perl yum install cpio yum install expat-devel yum install gettext-devel
下载git源码包：
https://github.com/git/git/releases
安装：
cd /git源码包解压路径 autoconf ./configure make make install
安装完毕后运行git若出现：“libiconv.so.2: cannot open shared object file”则：
在/etc/ld.so.conf中加一行“/usr/local/lib”，然后运行/sbin/ldconfig
原文：http://my.oschina.net/since1986/blog/292320