What you would need to do is:
wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
If you still get an SSL warning try:
wget --no-check-certificate https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Then you can
rpm -Uvh webtatic-release.rpm
Which should show up here:
ll /etc/yum.repos.d