like the previous, should be a no-op.  passes regress with
GOT_TEST_PACK=1.

P.S.: if someone is bored and grep doesn't lie,
got_object_read_raw_delta() is currently unused.

diff refs/heads/main refs/heads/x
commit - 265df21f29865b8cc1eb0f0b93b8ca91ff134414
commit + 7064a22e5313954a54de57b35d24f5e4f6c54959
blob - a0f34aa4a82baaa0867ea1ea1ae0e1c7cbbd20bf
blob + cce4cea87c0a4dcf12328d3491728a50bcce8f84
--- lib/got_lib_privsep.h
+++ lib/got_lib_privsep.h
@@ -304,7 +304,7 @@ struct got_imsg_raw_delta {
 
 /* Structure for GOT_IMSG_RAW_DELTA. */
 struct got_imsg_raw_delta {
-	uint8_t base_id[SHA1_DIGEST_LENGTH];
+	struct got_object_id base_id;
 	uint64_t base_size;
 	uint64_t result_size;
 	off_t delta_size;
@@ -546,7 +546,7 @@ struct got_imsg_raw_delta_request {
  * Structure for GOT_IMSG_RAW_DELTA_REQUEST data.
  */
 struct got_imsg_raw_delta_request {
-	uint8_t id[SHA1_DIGEST_LENGTH];
+	struct got_object_id id;
 	int idx;
 };
 
blob - 8b8219e58dcd172645c354edfcb985499bd7faa6
blob + 48bdc5abc37116465cd5276b7720b4809ef3079c
--- lib/privsep.c
+++ lib/privsep.c
@@ -2954,7 +2954,7 @@ got_privsep_send_raw_delta_req(struct imsgbuf *ibuf, i
 
 	memset(&dreq, 0, sizeof(dreq));
 	dreq.idx = idx;
-	memcpy(dreq.id, id->sha1, SHA1_DIGEST_LENGTH);
+	memcpy(&dreq.id, id, sizeof(dreq.id));
 
 	if (imsg_compose(ibuf, GOT_IMSG_RAW_DELTA_REQUEST, 0, 0, -1,
 	    &dreq, sizeof(dreq)) == -1)
@@ -2984,7 +2984,7 @@ got_privsep_send_raw_delta(struct imsgbuf *ibuf, uint6
 	idelta.delta_compressed_size = delta_compressed_size;
 	idelta.delta_offset = delta_offset;
 	idelta.delta_out_offset = delta_out_offset;
-	memcpy(idelta.base_id, base_id->sha1, SHA1_DIGEST_LENGTH);
+	memcpy(&idelta.base_id, &base_id, sizeof(idelta.base_id));
 
 	ret = imsg_compose(ibuf, GOT_IMSG_RAW_DELTA, 0, 0, -1,
 	    &idelta, sizeof(idelta));
@@ -2997,7 +2997,8 @@ got_privsep_recv_raw_delta(uint64_t *base_size, uint64
 const struct got_error *
 got_privsep_recv_raw_delta(uint64_t *base_size, uint64_t *result_size,
     off_t *delta_size, off_t *delta_compressed_size, off_t *delta_offset,
-    off_t *delta_out_offset, struct got_object_id **base_id, struct imsgbuf *ibuf)
+    off_t *delta_out_offset, struct got_object_id **base_id,
+    struct imsgbuf *ibuf)
 {
 	const struct got_error *err = NULL;
 	struct imsg imsg;
@@ -3036,7 +3037,7 @@ got_privsep_recv_raw_delta(uint64_t *base_size, uint64
 			err = got_error_from_errno("malloc");
 			break;
 		}
-		memcpy((*base_id)->sha1, delta->base_id, SHA1_DIGEST_LENGTH);
+		memcpy(*base_id, &delta->base_id, sizeof(**base_id));
 		break;
 	default:
 		err = got_error(GOT_ERR_PRIVSEP_MSG);
blob - 7da00ecab5dd244314979ca026eb0743fa4b139b
blob + d3624830234626794cb116fcaee59a11d7cac75b
--- libexec/got-read-pack/got-read-pack.c
+++ libexec/got-read-pack/got-read-pack.c
@@ -880,7 +880,7 @@ raw_delta_request(struct imsg *imsg, struct imsgbuf *i
 	if (datalen != sizeof(req))
 		return got_error(GOT_ERR_PRIVSEP_LEN);
 	memcpy(&req, imsg->data, sizeof(req));
-	memcpy(id.sha1, req.id, SHA1_DIGEST_LENGTH);
+	memcpy(&id, &req.id, sizeof(id));
 
 	imsg->fd = -1;