In any way putting that link in the browser works. The link with the full name doesn’t work.
Usually github uses a link containing only the version number but when you click on it using a browser it saves an archive with the name and the version. This doesn’t happened with wget, of course. But the archive in the OpenMandriva file-store contains the full name so I use the full name in the file .abf.yml and the real link in the spec. I don’t know if it is the right way.