diff --git a/src/grub2/grub-static-pre.cfg b/src/grub2/grub-static-pre.cfg
index 9717cfb9..d4a81d88 100644
--- a/src/grub2/grub-static-pre.cfg
+++ b/src/grub2/grub-static-pre.cfg
@@ -1,4 +1,4 @@
-# This file is copied from https://github.com/coreos/coreos-assembler/blob/main/src/grub.cfg
+# This file is copied from https://github.com/coreos/coreos-assembler/blob/0eb25d1c718c88414c0b9aedd19dc56c09afbda8/src/grub.cfg
 # Changes:
 #   - Dropped Ignition glue, that can be injected into platform.cfg
 # petitboot doesn't support -e and doesn't support an empty path part