Copy utility: FIFO queue to add copy jobs

Basically, a Copy utility that comes with a FIFO queue to add copy jobs.
By default, in Finder, when you launch a batch of files to copy, these are copied one by one. If you launch a second batch of copy, before the first ends, both batch run at the same time. If these batches share a common source or destination disk, both copy processes suffer. This tool should enable that the second batch should run after the first batch is completed, with the possibility to queue several batches (hundreds maybe).
This way, if I'm moving several TB from an external disk to another, and in the meantime, add more files to the copy, there are not copied in parallel, but after the first batch of files.