Koji and Signing RPMS

[Greg Trahair]

> To sign an rpm from koji, you should make a copy of the file, sign it
> with the appropriate rpm command, and import the signature. Fedora
> rel-eng has a script to help automate this. Note that you should not
> simply sign the file directly under /mnt/koji, as this causes an
> inconsistency between the filesystem and the database (hence the copy
> step).
> 
> https://fedorahosted.org/rel-eng/browser/scripts/sign_unsigned.py

How do I use this sign_unsigned.py script?