It is easily possible to install COPR builds via yum/dnf, but that is currently not the case for Koji builds. For an internal RH instance, this missing functionality is being worked around by a custom service separate from Koji that creates repos people can use. However, as this is an extra service maintained by RH folks for convenience, there is no equivalent functionality available for any other Koji instances (Fedora, CentOS Stream). This missing feature has been raised by kernel folks as an inconvenience for users who want to test their builds easily.

It would be great if Koji could create the repos when builds finish by itself so users don't have to slap an extra service on top of it to compensate for the lack of feature. Besides providing the feature for all Koji users, it would also save on internal resources as the internal workaround service will no longer have to be maintained.

The RH internal custom repo service code is available internally on gitlab.cee under devops/brew-task-repos namespace if internal folks want to check it out for inspiration.

Tomas Kopecek mentioned this could be implemented as a plugin.