Use centos repository in RHEL

Get the repository url in your country, by visiting http://mirror-status.centos.org/. In my case, since I am in Malaysia, I chose http://centos.ipserverone.com/centos/

Create a repo file in /etc/yum.repos.d
# cat > /etc/yum.repos.d/centos.repo
[centos]
name=CentOS-7
baseurl=http://centos.ipserverone.com/centos/7/os/x86_64/
enabled=1
gpgcheck=1
gpgkey=http://centos.ipserverone.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7

Press ctrl-d to exit and save

Check whether your new centos repo is listed and ready to be used
# yum repolist

Done