I see

  Subject: Request 678166 changed to declined (submit openSUSE:Factory/cdk)
  [...]
  Visit https://build.opensuse.org/request/show/678166

  State of request 678166 was changed by factory-auto:
    review -> declined
  Comment:
    Output of check script:
  ERROR: Failed to download
"ftp://invisible-island.net/cdk/cdk-5.0-20190220.tgz"
    Source URLs are not valid. Try "osc service localrun download_files"
  Actions:
  - submit security/cdk => openSUSE:Factory/cdk

but if I do a download with wget it works!  Can we have a more flexible
handling at submit requesting time?  Something like checking network first and
then the host as well as the connections in past *before* setting requests to
declined?