Fake root for `make install`

I would like to know how to have a program 
installed into a fake root folder so I know 
*before* making an RPM what files it will try to 
install. I'm not trying to find out how to have 
the files put into a fake root folder during the 
making of the RPM but rather when I run make 
install from a console before making even starting 
on a spec file. 
 
Alternatively I would like some way of knowing 
what files are created by `make install` and where 
they go without actually having to run it. 
 
Thanks. 
 
Nathan.