'mv' read all about it from within Terminal with -
man mv
The mv command doesn't have that option, so you would need to watch the transfer from somewhere else. If you are using Xcode, take a look at NSTask.
You may wish to look into 'rsync' instead.
It can be used for local file transfers as well as remote.
It does have a progress feed-back mechanism.
Read all about it at ..., well you know!