转载，原文地址
安装需求：
# yum install -y curl-devel expat-devel gettext-devel openssl-devel zlib-devel asciidoc
# yum install -y gcc perl-ExtUtils-MakeMaker xmlto
# wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.14.tar.gz
# tar zxvf libiconv-1.14.tar.gz
# cd libiconv-1.14
# ./configure --prefix=/usr/local/libiconv
# make && make install
卸载Centos自带的git1.7.1:
# yum remove git
下载git2.2.1并将git添加到环境变量中
# wget https://github.com/git/git/archive/v2.2.1.tar.gz
# tar zxvf v2.2.1.tar.gz
# cd git-2.2.1># make configure
# ./configure --prefix=/usr/local/git --with-iconv=/usr/local/libiconv
# make all doc
# make install install-doc install-html
# ln -s /usr/local/bin/git /usr/local/git/bin/git
查看版本号
# git --version
git version 2.2.1
