revs              297 revision.h     typedef enum rewrite_result (*rewrite_parent_fn_t)(struct rev_info *revs, struct commit **pp);
revs              299 revision.h     extern int rewrite_parents(struct rev_info *revs, struct commit *commit,
revs              311 revision.h     extern struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit);