Thus, we’d like to know what are the alternative opam repositories for which it would make sense to be added to Software Heritage. So, if you can think of any repository, tell us here.
You may find it useful to search for opam-repository on GitHub, via Search · opam-repository · GitHub – there are quite a few custom remotes.
When you assemble a list for Software Heritage, I’d also welcome a PR to the ocaml/opam README file with a few pointers to other remotes. Also, can the Software Heritage archive be used as an alternative mirror by opam, if the original releases disappear from the web?