Gave them all a Universally Unique Identifer, per RFC 4122.
Should simplify rearranging the site sources. Helpful hint: don’t rely on filenames as unique content identifiers for your workflow. Oh sure they work fine 80% of the time, but that last 20% is a doozy.
I used Python’s uuid library. There’s also the uuidgen command if I switch away from a Python workflow.