That was me. I'm part of ArchiveTeam and Software Heritage and I'm one of the Debian sysadmins, the latter got some advanced notice. I figured archives of xz related stuff would be important once the news broke, so I saved the xz website and the GitHub repos. I regret that I didn't think to join the upstream IRC channel and archive the rest of the tukaani.org domain, nor archive the git.tukaani.org repos. Been archiving links from these threads ever since the news broke.
https://archive.softwareheritage.org/browse/origin/visits/?o...