Moodle 4.4+ 

Perform course backup with multiple course activities.

Deselect several course activities (Students will only be required to train on the deselected activities).

see image (back deselect several activities...)

Perform restore and verify that the selected activities will not be copied into the new course. 

see image (restored course correctly displays...)

Complete the restore and view the restored course's Activity Completion view. All Activities were copied into the restored course - Users selections were not retained.

see image (Activity Completion reports...)