Summary says it all. I manually built from F20 SRPM without any errors. Thanks!
openbox-3.5.2-6.el7 has been submitted as an update for Fedora EPEL 7. https://admin.fedoraproject.org/updates/openbox-3.5.2-6.el7
openbox-3.5.2-6.el7 has been pushed to the Fedora EPEL 7 testing repository.
openbox-3.5.2-6.el7 has been pushed to the Fedora EPEL 7 stable repository.