Changelog for yubikey-manager-0.4.0-2.fc28.noarch.rpm :

* Fri Feb 09 2018 Fedora Release Engineering - 0.4.0-2- Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
* Wed Aug 09 2017 Seth Jennings - 0.4.0-1- New package- Upstream release