Owning or Disowning a Bash Job?

Bash provides the ability to disown a job, which is effectively the same as starting the job with nohup. My problem is that I’d like to reverse the disown process and own the job again.

$ my --really --long --process
$ # Oh shit, I forgot to open screen beforehand :(
$ disown -h 1
$ screen
$ own <PID>

Is that even remotely possible? Does anyone else see a use for it?

…perhaps I should just get my act together and spawn a screen session via my .bashrc.