You can use WANDisco's CentOS repository to install Git 2.x: for CentOS 6, for CentOS 7

1. Install WANDisco repo package:

   yum install http://opensource.wandisco.com/centos/6/git/x86_64/wandisco-git-release-6-1.noarch.rpm
   - or -
   yum install http://opensource.wandisco.com/centos/7/git/x86_64/wandisco-git-release-7-1.noarch.rpm
   - or -
   yum install http://opensource.wandisco.com/centos/7/git/x86_64/wandisco-git-release-7-2.noarch.rpm
   

2. Install the latest version of Git 2.x:

   yum install git
   

3. Verify the version of Git that was installed:

   git --version