/* If set, the ref filename to write the target value to. */
extern const char *write_ref;
-/* If set, the hash that the current value of write_ref must be. */
-extern const unsigned char *current_ref;
+/* If set additional text will appear in the ref log. */
+extern const char *write_ref_log_details;
/* Set to fetch the target tree. */
extern int get_tree;