-#define __kh_oid_cmp(a, b) (hashcmp(a, b) == 0)
-
-KHASH_INIT(sha1, const unsigned char *, void *, 1, sha1hash, __kh_oid_cmp)
-typedef kh_sha1_t khash_sha1;
-
-KHASH_INIT(sha1_pos, const unsigned char *, int, 1, sha1hash, __kh_oid_cmp)
-typedef kh_sha1_pos_t khash_sha1_pos;
-
-static inline unsigned int oid_hash(struct object_id oid)