/** Reads log for the value of ref during at_time. **/
extern int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *sha1);
+/* iterate over reflog entries */
+typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, char *, void *);
+void for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
+
/** Returns 0 if target has the right format for a ref. **/
extern int check_ref_format(const char *target);
+/** rename ref, return 0 on success **/
+extern int rename_ref(const char *oldref, const char *newref, const char *logmsg);
+
#endif /* REFS_H */