现在按计划运行

Say I schedule a job to be run in a few days using at. And say in a few hours I think, "you know, I want that command to run now". Is there a simple way to just run that scheduled job now, instead of later?

I'm aware I could simply atrm it and run the command by hand, but our commands are automated and quite complex. It would be nice if there was some simple way to run the jobs now instead of later.