Check out this post
. Tricky, but it should work
So I guess the command you'd want is:
cp -ar * .[^.]* /home/home-bkup
The junk with the brackets just tells cp to also copy anything beginning with a dot, but not beginning with two dots (to prevent it from copying everything in the parent directory also). The same technique can also be used with rm, to remove hidden files, but be careful with it in that case, especially if you are running as root! You could very easily remove a whole bunch of stuff you didn't mean to.