```ruby
module Tango
  module Fetch

    def fetch(url)
      shell("wget", "--progress=bar:force", "--continue", url)
    end

  end
end
```

Use curl rather than wget.
user
```ruby
module Tango
  module Fetch

    def fetch(url)
      shell("curl", "-O", "-C", "-", "--progress-bar", url)
    end

  end
end
```
assistant