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升级Git到 2.x
https://github.com/git/git/tree/v2.13.1 找个稳定版本，找个最新Tag就行了
https://www.kernel.org/pub/software/scm/git/ 从这下载
环境: CentOS 7.x
su - root #使用root
yum install perl-ExtUtils-CBuilder perl-ExtUtils-MakeMaker #安装依赖
wget https://www.kernel.org/pub/software/scm/git/git-2.13.1.tar.gz #下载
tar xzf git-2.13.1.tar.gz
cd git-2.13.1
./configure
make
make install