BitBucket dropped support for mercurial. But the repositories that were not manually deleted can still be found with a name like something_123456_hg when I try to add repositories in a project. But they are not selectable. Neither I can find them by searching the repositories or adding the name in the correct position in the url.
tried to clone them with hg clone which ended up to 403 ( the credentials were correct) .
I am really curious if there is a way to download those repositories.
Softwareheritage has archived all the public repos here, if you can't get at them any other way.