Install Fedora to separate partition or chroot on a running system?

[Chuck Anderson]

Is there any way to install Fedora, using either anaconda or yum or 
something else, to a separate partition or chroot path, on a system 
while it is currently running and booted into Fedora?  I realize you 
can't safely upgrade a currently installed system while it is running, 
but I want to install and/or upgrade a *separate* copy than the one 
that is currently running.  I was thinking of something along the 
lines of what revisor does to create a Live media image, or what mach 
does to create a buildroot, or what virt-manager/virt-install does to 
install a Xen guest, but instead I just want to create a regular 
Fedora install that I can then boot the real system into after it is 
done installing.  I realized that I might need to manually tweak the 
bootloader, etc.

e.g. something along these lines would be excellent, where I have 
already created the blank filesystems and mounted them under 
/mnt/new-fedora-root:

anaconda --root=/mnt/new-fedora-root

Thanks.