RPMforge:

rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt

RPMforge for 64bit install (url is old?)

rpm -ivh http://apt.sw.be/redhat/el5/en/x86_64/dag/RPMS/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm

install:

yum --enablerepo=rpmforge -y install git

check:

git --version