extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
+extern int interpret_nth_last_branch(const char *str, struct strbuf *);
extern int refname_match(const char *abbrev_name, const char *full_name, const char **rules);
extern const char *ref_rev_parse_rules[];
extern const char *git_commit_encoding;
extern const char *git_log_output_encoding;
+extern const char *git_mailmap_file;
/* IO helper functions */
extern void maybe_flush_or_die(FILE *, const char *);