Hi,

To me at leaset it looks like the buildroot for EPEL5 ppc is broken, e.g.

DEBUG util.py:250: Error: Package: fakeroot-1.12.2-21.el5.2.ppc (build)
DEBUG util.py:250: Requires: /bin/sh
DEBUG util.py:250: Error: Package: xz-4.999.9-0.1.beta.20091007git.el5.ppc (build)
DEBUG util.py:250: Requires: libpthread.so.0
DEBUG util.py:250: Error: Package: rpmdevtools-6.8-1.el5.noarch (build)
DEBUG util.py:250: Requires: sed
DEBUG util.py:250: Error: Package: fakeroot-1.12.2-21.el5.2.ppc (build)
DEBUG util.py:250: Requires: libc.so.6(GLIBC_2.1)

my guess of course is that while the EPEL packages are there the RHEL packages are not?

Examples:

https://koji.fedoraproject.org/koji/taskinfo?taskID=3172891
with root.log
https://koji.fedoraproject.org/koji/getfile?taskID=3172891&name=root.log

and a scratch build of previously okay package.
http://koji.fedoraproject.org/koji/taskinfo?taskID=3173963
with root.log
http://koji.fedoraproject.org/koji/getfile?taskID=3173963&name=root.log