int valid_fetch_refspec(const char *refspec);
struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec);
-struct refspec *parse_push_refspec(int nr_refspec, const char **refspec);
-void free_refspecs(struct refspec *refspec, int nr_refspec);
int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
int nr_refspec, const char **refspec, int all);