When tracking a repository with the `--fetch` option, we run a fetch
once the tracking is done.
When tracking nodes, we don't accept the `--fetch` flag, as there may
not be a repository to fetch.
The method `track_repo` only accepted the RID as the argument for
tracking.
Instead, allow passing Scope as an argument for tracking a
repository.
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett