The header includes the full kernel version as a comment in the
generated/autoconf.h file which invalidates the ccache on every minor update.
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -1055,7 +1055,7 @@
 		return -1;
 	}
 
-	conf_write_heading(file, comment_style);
+	// conf_write_heading(file, comment_style);
 
 	for_all_symbols(sym)
 		if ((sym->flags & SYMBOL_WRITE) && sym->name)
