The stable Wesnoth 1.12.x for Fedora 26, 27 and Rawhide, with bumped Epoch.

Just enable the Copr and run an upgrade, which due to the Epoch, will downgrade Wesnoth to the stable release. To upgrade back to 1.13.x, just disable this Copr and do a distro-sync.

This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/kkofler/wesnoth-stable/