function next() {
		var repo;
		if ( count === len ) {
			debug( 'Finished all queries.' );
			out.meta.success = scount;
			out.meta.failure = fcount;
			return clbk( null, out );
		}
		if ( idx < len ) {
			repo = repos[ idx ];
			debug( 'Querying repository `%s` (%d).', repo, idx );

			options.path = '/'+repo+'/'+opts.branch+'/'+filepath;
			debug( 'Path: %s', options.path );

			request( options, responseFactory( repo, idx ) );
			idx += 1;
		}
	}
Requests a file from the next repository in the queue. Once requests for all desired repos have completed, invokes the provided callback.

@private
@returns {void}