This fixes crashes like these:
[depcheck] 06:55:43 WARNING Mirror Error: None Status code: 404 for http://infrastructure.fedoraproject.org/pub/fedora/linux/updates/26/i386/repodata/repomd.xml
https://taskotron.fedoraproject.org/taskmaster/builders/x86_64/builds/438813
that occur on F26 and rawhide with i386 tasks. The repos are now elsewhere.