For public git repositories on https://github.com one can use the API with curl and jq to list relevant repositories along with some information:
curl -G https://api.github.com/search/repositories \
--data-urlencode 'q=XXX+size:>25' \
-H "Accept: application/vnd.github.v3.raw+json" \
| jq '.items[] | {html_url, watchers_count, language, name}'
While this works nicely for public repositories, is there a way to search repositories which once were public but then have been deleted or switched to private - and access them at the status when they were public? I.e., I am wondering if there is nothing like http://web.archive.org/ for git repositories.