Earlier quoted context omitted.
I clarified the comment a bit -- I considered that attribution-stripping, but I think you're right that it's more than just that. Tangentially: it's somewhat interesting that we don't consider the source code history in our OSS licenses...
FWIW, I don't see anything wrong with stripping the git history. I think it's stupid and short-sighted, but whatever, it's allowed. One use case I've seen, sometimes you want to pull a single file from another project without a bunch of baggage. Your license should cover the history, in that every source file should bear a license header, going back to the first commit.
This is one way to do it. Problem remains when these important parts, even whole files - e.g. COPYRIGHT - are removed from the archived copy.
From what the original author reports, this is what happened.