How to execute oscap rules requiring remote resources when the system has no access to www.redhat.com

Issue

• My system has no access to the Internet, preventing me from executing rules requiring remote resources, as shown in the example below when scanning a RHEL8 system

  # oscap xccdf eval --profile xccdf_org.ssgproject.content_profile_stig --rule xccdf_org.ssgproject.content_rule_security_patches_up_to_date /usr/share/xml/scap/ssg/content/ssg-rhel8-ds.xml
  WARNING: Datastream component 'scap_org.open-scap_cref_security-data-oval-com.redhat.rhsa-RHEL8.xml' points out to the remote 'https://www.redhat.com/security/data/oval/com.redhat.rhsa-RHEL8.xml'. Use '--fetch-remote-resources' option to download it.
  WARNING: Skipping 'https://www.redhat.com/security/data/oval/com.redhat.rhsa-RHEL8.xml' file which is referenced from datastream
  WARNING: Skipping ./security-data-oval-com.redhat.rhsa-RHEL8.xml file which is referenced from XCCDF content
  
  Title   Ensure Software Patches Installed
  Rule    xccdf_org.ssgproject.content_rule_security_patches_up_to_date
  Ident   CCE-80865-9
  Result  notchecked