Now it seems builders have problems:
[andrea@panoramix zboy]$ rfpkg build
Building zboy-0.60-2.fc25 for rawhide-free
Created task: 7991
Task info: http://koji.rpmfusion.org/koji/taskinfo?taskID=7991
Watching tasks (this may be safely interrupted)...
7991 build (rawhide-free, /free/zboy:df3a2631ef5d9937684988694b9d250e6ad2ff2b): free
7991 build (rawhide-free, /free/zboy:df3a2631ef5d9937684988694b9d250e6ad2ff2b): free -> open (arm-builder03.scaleway.rpmfusion.net)
  7992 buildSRPMFromSCM (/free/zboy:df3a2631ef5d9937684988694b9d250e6ad2ff2b): free
  7992 buildSRPMFromSCM (/free/zboy:df3a2631ef5d9937684988694b9d250e6ad2ff2b): free -> open (arm-builder02.scaleway.rpmfusion.net)
  7992 buildSRPMFromSCM (/free/zboy:df3a2631ef5d9937684988694b9d250e6ad2ff2b): open (arm-builder02.scaleway.rpmfusion.net) -> FAILED: BuildrootError: could not init mock buildroot, mock exited with status 30; see root.log for more information
  0 free  1 open  0 done  1 failed
7991 build (rawhide-free, /free/zboy:df3a2631ef5d9937684988694b9d250e6ad2ff2b): open (arm-builder03.scaleway.rpmfusion.net) -> FAILED: BuildrootError: could not init mock buildroot, mock exited with status 30; see root.log for more information
  0 free  0 open  0 done  2 failed

7991 build (rawhide-free, /free/zboy:df3a2631ef5d9937684988694b9d250e6ad2ff2b) failed