1. 下载地址

https://github.com/git/git/releases

https://mirrors.edge.kernel.org/pub/software/scm/git/

2. 不建议用wget下载，可能会存在包有问题无法解压的情况，直接去下载页面下载好以后，传到centos上。

wget https://github.com/git/git/releases/tag/v2.28.0/git-2.28.0.tar.gz
wget https://www.kernel.org/pub/software/scm/git/git-2.28.0.tar.gz

[root@VM_3_96_centos /home]# tar -zvxf git-2.28.0.tar 

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now

3. 安装脚本，先卸载旧版本的git。因为yum安装的git会放到/usr下面的bin，libexec，share目录下，所以我们这里prefix=/usr

yum remove git
tar -zvxf git-2.28.0.tar.gz
cd git-2.28.0
make prefix=/usr all
make prefix=/usr install