Changelog for raptor-1.4.21-21.fc23.x86_64.rpm :
Thu Jun 18 14:00:00 2015 Fedora Release Engineering - 1.4.21-21
- Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild

Sun Aug 17 14:00:00 2014 Fedora Release Engineering - 1.4.21-20
- Rebuilt for https://fedoraproject.org/wiki/Fedora_21_22_Mass_Rebuild