Git官网源码地址：

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

下载git源码包：

https://www.kernel.org/pub/software/scm/git/git-2.26.2.tar.gz

从源代码安装：

Git 依赖的库：autotools、curl、zlib、openssl、expat 和 libiconv。

yum -y install epel-release
yum makecache
yum -y install dh-autoreconf curl-devel expat-devel gettext-devel openssl-devel perl-devel zlib-devel
# sudo apt-get install dh-autoreconf libcurl4-gnutls-dev libexpat1-dev gettext libz-dev libssl-dev

添加文档的多种格式（doc、html、info）依赖如下：

yum -y install asciidoc xmlto docbook2X gdb-doc
# sudo apt-get install asciidoc xmlto docbook2x

编译并安装

tar -zxf git-2.26.2.tar.gz
cd git-2.26.2
./configure --prefix=/usr
make all doc info -j 4
make install install-doc install-html install-info

完成后，使用 Git 来获取 Git 的更新：

git clone git://git.kernel.org/pub/scm/git/git.git