Please create epel8 build.
FEDORA-EPEL-2019-334e9acab6 has been submitted as an update to Fedora EPEL 8. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-334e9acab6
wmctrl-1.07-27.el8 has been pushed to the Fedora EPEL 8 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-334e9acab6
I created epel8 branch as i am going to co-maintain it.
wmctrl-1.07-27.el8 has been pushed to the Fedora EPEL 8 stable repository. If problems still persist, please make note of it in this bug report.