Corrupt repos and broken mockbuild ?

[Krzysztof Daniel]

Hello,

while trying to build a rawhide package with fedpkg mockbuild I get:
[...]
Finishing delta rebuilds of 10 package(s) (3.4 M)
Some delta RPMs failed to download or rebuild. Retrying..
http://ftp.ps.pl/pub/Linux/fedora-linux/development/rawhide/x86_64/os/Pac...:
[Errno -1] Package does not match intended download. Suggestion: run yum
--enablerepo=fedora clean metadata
Trying other mirror.
[...]

and then later 

Error downloading packages:
  qrencode-libs-3.4.2-1.fc20.x86_64: [Errno 256] No more mirrors to try.
  [...]

yum clean all does not help. How can I get it working again?

-- 
Krzysztof Daniel <kdaniel(a)redhat.com&gt;
Red Hat