You can clone a job by pressing the "Clone" button on the Jobs tab of the related project or right on the job page:
It will open the New job page where you can select files for this job, change service, vendor, etc., if necessary.
Here you can also add any additional files by pressing the "Add input files" button.
Having changed variables, set the required deadline and press "Create":
It will display the newly created job page in the "Draft" status.
If you press the "Create and clone" button, the previous job will be created, and you may add a new one based on pre-entered data right away.