How do I copy a hierarchical module in KiCAD?
If you have many same schematic blocks you want to reuse, you can use hierarchical sheet like this: (Kicad-4.0.2-stable MacOSX)


Create a hierarchical sheet with sheet name A_1 , file name A.sch
Place your components and wires into this hierarchical sheet.
Add a new hierarchical sheet with sheet name A_x (x is 1, 2, 3), file name A.sch ( only if the file name is the same, but different sheet name will work)
Done.