struct commit *lookup_commit(unsigned char *sha1);
+int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size);
+
int parse_commit(struct commit *item);
+void commit_list_insert(struct commit *item, struct commit_list **list_p);
+
void free_commit_list(struct commit_list *list);
+void sort_by_date(struct commit_list **list);
+
+/** Removes the first commit from a list sorted by date, and adds all
+ * of its parents.
+ **/
+struct commit *pop_most_recent_commit(struct commit_list **list,
+ unsigned int mark);
+
#endif /* COMMIT_H */