pass hook configuration through CLI arguments

common/config.go

@@ -27,7 +27,9 @@ type Config struct {
 	// The hook name is its first argument; Git's original args, stdin and
 	// environment are preserved. Empty disables hook effects.
 	HookScript string
-	DBUri      string
+	// HookArgs are fixed CLI arguments placed before the hook type and repo.
+	HookArgs []string
+	DBUri    string
 
 	preparedDbUri string
 	prepared      atomic.Bool