grub> root (hd1,0)
grub> setup (hd0)
After doing this as root, grub now finds its configuration file
correctly (automatically), yay!
I'd guess that anaconda isn't doing quite the right thing when setting
up grub. In fact, it appears to be this bug:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=159089
I've updated the bug report with the results of this thread. Thanks for
the help!
-Ed