Eu consertei sozinho.
altere /etc/yum.repos.d/epel.repo
da seguinte forma
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
enabled=1
# ------^------- set this to zero
failovermethod=priority
gpgcheck=1
gpgkey=http://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-6