--- redhat-upgrade-tool.py.orig	2023-12-18 12:27:36.000000000 +0200
+++ redhat-upgrade-tool.py	2023-12-20 09:08:46.522875724 +0200
@@ -273,12 +273,10 @@ def main(args):
     if args.nogpgcheck:
         f._override_sigchecks = True
     elif not f.instrepo.gpgcheck:
-        # If instrepo is a Red Hat repo, add the gpg key and reload the repos
+        # If instrepo is a CentOS repo, add the gpg key and reload the repos
         try:
-            key = "product"
-            if not f.treeinfo.has_section(key):
-                key = "release"
-            if f.treeinfo.get(key, 'name') == 'Red Hat Enterprise Linux':
+            key = "general"
+            if f.treeinfo.get(key, 'family') == 'CentOS':
                 log.info("Reloading repos with GPG key")
                 args.repos.append(('gpgkey', '%s=%s' % (f.instrepo.name, rhel_gpgkey_path)))
                 f = setup_downloader(version=args.network,
@@ -534,22 +534,10 @@ def check_preupg_risks():
 
 def check_same_variant_upgrade(treeinfo):
     distro = platform.linux_distribution()[0]
-    if not distro.startswith("Red Hat Enterprise Linux "):
+    if distro not in ("CentOS"):
         print _("Invalid distribution: %s") % distro
         raise SystemExit(1)
 
-    from_variant = distro[len('Red Hat Enterprise Linux '):]
-    try:
-        to_variant = treeinfo.get('general', 'variant')
-    except NoOptionError:
-        print _("Upgrade repository is not a Red Hat Enterprise Linux repository")
-        raise SystemExit(1)
-
-    if from_variant != to_variant:
-        print _("Upgrade requested from Red Hat Enterprise Linux %s to %s") % (from_variant, to_variant)
-        print _("Upgrades between Red Hat Enterprise Linux variants is not supported.")
-        raise SystemExit(1)
-
 
 if __name__ == '__main__':
     args = parse_args()