diff -up usr/lib/python3.6/site-packages/productmd/treeinfo.py.dist usr/lib/python3.6/site-packages/productmd/treeinfo.py
--- usr/lib/python3.6/site-packages/productmd/treeinfo.py.dist	2022-02-11 21:45:26.579532429 +0900
+++ usr/lib/python3.6/site-packages/productmd/treeinfo.py	2022-02-11 21:51:27.250301406 +0900
@@ -245,6 +245,8 @@ class Release(BaseProduct):
         elif self.name.startswith("CentOS"):
             self.name = "CentOS"
             self.short = "CentOS"
+        elif self.name.startswith("Rocky"):
+            self.short = "Rocky"
         else:
             self.short = None