Wacom kernel module(s).
For EL7:
cd '/etc/yum.repos.d/'
curl 'https://copr.fedorainfracloud.org/coprs/scx/wacom-kmod/repo/epel-7/scx-wacom-kmod-epel-7.repo' > 'scx-wacom-kmod-epel-7.repo'
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/scx/wacom-kmod/