An updated external EPEL CentOS 7 COPR repo is available now available which contains Dogtag 10.3.1 builds:

• https://copr.fedorainfracloud.org/coprs/g/pki/10.3.1/repo/epel-7/group_pki-10.3.1-epel-7.repo

  [group_pki-10.3.1]
  name=Copr repo for 10.3.1 owned by @pki
  baseurl=https://copr-be.cloud.fedoraproject.org/results/@pki/10.3.1/epel-7-$basearch/
  skip_if_unavailable=True
  gpgcheck=1
  gpgkey=https://copr-be.cloud.fedoraproject.org/results/@pki/10.3.1/pubkey.gpg
  enabled=1
  enabled_metadata=1

-- Matt