由于centos中的源仓库中git不是最新版本，需要进行源码安装。

1、查看yum仓库git信息

[root@iZm5e3d4r5i5ml889vh6esZ zh]# yum info git
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Installed Packages
Name        : git
Arch        : x86_64
Version     : 1.8.3.1
Release     : 13.el7
Size        : 22 M
Repo        : installed
From repo   : base
Summary     : Fast Version Control System
URL         : http://git-scm.com/
License     : GPLv2
Description : Git is a fast, scalable, distributed revision control system with an: unusually rich command set that provides both high-level operations: and full access to internals.: : The git rpm installs the core tools with minimal dependencies.  To: install all git packages, including tools for integrating with other: SCMs, install the git-all meta-package.

2、依赖仓库安装

[root@iZm5e3d4r5i5ml889vh6esZ zh]# yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel
[root@iZm5e3d4r5i5ml889vh6esZ zh]# yum install  gcc perl-ExtUtils-MakeMaker

3、卸载已安装的git

[root@iZm5e3d4r5i5ml889vh6esZ zh]# yum remove git

4、下载git最新源码

下载地址：https://github.com/git/git/releases

wget https://github.com/git/git/archive/v2.17.1.tar.gz

5、安装

解压、安装

[root@iZm5e3d4r5i5ml889vh6esZ git]# tar zxvf v2.17.1.tar.gz
[root@iZm5e3d4r5i5ml889vh6esZ git]# cd git-2.17.1/
[root@iZm5e3d4r5i5ml889vh6esZ git]# make prefix=/usr/local/git all
[root@iZm5e3d4r5i5ml889vh6esZ git]# make prefix=/usr/local/git install

6、添加到环境变量

[root@iZm5e3d4r5i5ml889vh6esZ git]# vim /etc/profile
export GIT_HOME=/usr/local/gitexport PATH=$GIT_HOME/bin:$PATH
[root@iZm5e3d4r5i5ml889vh6esZ git]# source /etc/profile

7、查看当前版本号

[root@iZm5e3d4r5i5ml889vh6esZ git]# git --version
git version 2.17.1