I am not sure what your problem is.
for example,at first your machine go "X0 Y0 Z0" by running the program.
and then you move the machine by jog or mpg,
so now you want your machine can move back to the "X0 Y0 Z0"?
if that is what you need, just run "X0 Y0 Z0" again, and your machine will move back..
be careful when machine moving..