otherwise, the linter complains
Currently, only build id is returned, more will come when needed.
This does not yet actually upload the image, and it only supports empty images. You need to place a an empty file named <filename>, with a valid extension (e.g., .qcow2) in /mnt/koji/work/<directory>/. Signed-off-by: Tom Gundersen <teg@jklm.no>