su -
yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel
yum install gcc perl-ExtUtils-MakeMaker
yum remove git
# Download source
# check latest version in http://git-scm.com/downloads
cd /usr/src
wget https://www.kernel.org/pub/software/scm/git/git-<latest-version>.tar.gz
tar xzf git-<latest-version>.tar.gz
# create git from source code
cd git-<latest-version>
make prefix=/opt/git all
make prefix=/opt/git install