koj-shadow depends on excludelist to skip packages that contain ExcludeArch or ExclusiveArch tags making the package fail to build on secondary arch. The list is created by the srpm-exlcuded-arch.py script from releng git repo. It would be useful to automate the runs of this script and send the results to the releng list for example once in a week. This way the secondary arch maintainers could keep their copies up-to-date.