Install mockchain and add the openshift dependency repo in /etc/mock/default.cfg
[openshift-deps]
name=openshift-deps
enabled=1
gpgcheck=0
baseurl=https://mirror.openshift.com/pub/origin-server/release/4/rhel-6/dependencies/x86_64/
priority=2
failovermethod=priority
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=0
[scl]
name=CentOS-$releasever - SCL
baseurl=http://mirror.centos.org/centos/$releasever/SCL/$basearch/
gpgcheck=0
enabled=0