原因：git 版本低
升级Git CentOS默认的是1.7
1、安装需求
yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel asciidoc
yum install gcc perl-ExtUtils-MakeMaker
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/
2、卸载原有Git
yum remove git
3、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（不成 后来自己打开链接下载的）
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
echo "export PATH=$PATH:/usr/local/git/bin" >> /etc/bashrc
source /etc/bashrc
git --version //git version 2.2.1
转载于：https://blog.csdn.net/z_dianjun/article/details/50819908