You can use WANDisco's CentOS repository to install Git 2.x

install_git2.x_on_centos.md

#Install Git2.x On Centos

• Install WANDisco repo package:

yum install http://opensource.wandisco.com/centos/6/git/x86_64/wandisco-git-release-6-1.noarch.rpm

• Install the latest version of Git 2.x:

yum install git

• Verify the version of Git that was installed:

git --version

AIO

yum install -y http://opensource.wandisco.com/centos/6/git/x86_64/wandisco-git-release-6-1.noarch.rpm
yum install -y git
git --version

Just automated your Command with Centos 7 and 6.

#!/bin/bash

centosversion=`rpm -qa \*-release | grep -Ei "oracle|redhat|centos" | cut -d"-" -f3`
echo "######################################################################################################"
echo "CentOS $centosversion server detected, Git 2* will install and configre as per centos $centosversion"
echo "######################################################################################################"

if [ $centosversion -eq "6" ]; then
echo 
echo "# Git YUM repo installing as per Centos 6"
echo
yum install -y http://opensource.wandisco.com/centos/6/git/x86_64/wandisco-git-release-6-1.noarch.rpm
echo
echo "Congratulations Wandisco YUM repo installed Successfully on the system "
echo
echo "Now installing Git on $hostname server"
yum install git -y
yum update git -y
fi

if [ $centosversion -eq "7" ]; then
echo 
echo "# Git YUM repo installing as per Centos 7"
echo
yum install -y http://opensource.wandisco.com/centos/7/git/x86_64/wandisco-git-release-7-2.noarch.rpm
echo
echo "Now installing Git on $hostname server"
yum install git -y
yum update git -y

fi 

clear

echo "GIT Latest version installed Successfully"
git --version

echo "Thanks :: Saiful Islam Rokon Akon"

exit 0