This is very easy setup.
cd /usr/src/
yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel
yum install gcc perl-ExtUtils-MakeMaker
git clone https://github.com/git/git.git
yum remove git
cd git/
make prefix=/usr/local/git all
make prefix=/usr/local/git install
add to /etc/bashrc
export PATH=/usr/local/git/bin:$PATH
source /etc/bashrc
git –version
git version 2.15.0.rc1.65.g660fb3d