The Changes document gives the following mkinitrd information:
Mkinitrd
--------
o <ftp://rawhide.redhat.com/pub/rawhide/SRPMS/SRPMS/>
However, rawhide.redhat.com/pub/rawhide no longer exists.
The current directory listing for pub is:
contrib/ .private/ redhat/ .snapshot/ up2date/
I've searched the web quite a bit and have failed to find
an authoritative distribution location.
Miles