stay up to date w.r.t. new GitHub repositories

currently addition of new GitHub repos is ad-hoc/manual, we should automate the catch up process (and make it spawn both fork and non-fork repositories)

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Migrated from T382 (view on Phabricator)

marked this issue as related to swh/devel/swh-lister#313 (closed)

marked this issue as related to #66 (closed)

added General Origin-GitHub future priority:Normal labels

Done as of swh/devel/swh-lister#585 (closed).

assigned to @olasd

closed