import requests
import io


def fetch_url_content(url):
    """
    Retrieves the contents of the given (presumed CDN) URL as a BytesIO.

    Performs no error checking; exceptions are handled in the check harness
    as part of check retrying behavior.
    """
    response = requests.get(url)
    response.raise_for_status()
    return io.BytesIO(response.content)