};
typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
-struct commit_graft *read_graft_line(char *buf, int len);
+struct commit_graft *read_graft_line(struct strbuf *line);
int register_commit_graft(struct commit_graft *, int);
struct commit_graft *lookup_commit_graft(const struct object_id *oid);