The Fedora Project Contributor Agreement (FPCA), which all Fedora contributors sign, exists to make sure that everything in the project is licensed in accordance with our “Freedom” value. The FPCA includes a provision which allows the Council to update the default license for either “code” or “content”:
The Fedora Council may, by public announcement, subsequently designate an additional or alternative default license for a given category of Contribution (a “Later Default License”). A Later Default License shall be chosen from the appropriate categorical sublist of Acceptable Licenses For Fedora.
The Fedora Council has approved a change from from the Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) license to the Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0) license for material classified as “content”. This message is the official public announcement of that change, which is effective as of today, the 13th of May 2021.
This license applies to content (not code) submitted to Fedora that does not have an explicit license attached. The FPCA is not a copyright assignment, and does not override the explicit license choices of contributors or upstream projects.