Delete contents of /srv/aus1-master.torproject.org/htdocs/torbrowser please
We have a ton of cruft with various write permissions in this dir. We've migrated this data to https://gitlab.torproject.org/tpo/applications/tor-browser-update-responses which we will be using to update in the future using the tb-release user.
Once everything's gone I can go back in and init a git repo in-place and pull down the remote main branch and all will be good.