diff --git a/builtin/describe.c b/builtin/describe.c
index 443546aaac..989a78d715 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -112,13 +112,13 @@ static int replace_name(struct commit_name *e,
 
 		if (!e->tag) {
 			t = lookup_tag(the_repository, &e->oid);
-			if (!t || parse_tag(t))
+			if (!t || parse_tag(the_repository, t))
 				return 1;
 			e->tag = t;
 		}
 
 		t = lookup_tag(the_repository, oid);
-		if (!t || parse_tag(t))
+		if (!t || parse_tag(the_repository, t))
 			return 0;
 		*tag = t;
 
@@ -335,7 +335,7 @@ static void append_name(struct commit_name *n, struct strbuf *dst)
 {
 	if (n->prio == 2 && !n->tag) {
 		n->tag = lookup_tag(the_repository, &n->oid);
-		if (!n->tag || parse_tag(n->tag))
+		if (!n->tag || parse_tag(the_repository, n->tag))
 			die(_("annotated tag %s not available"), n->path);
 	}
 	if (n->tag && !n->name_checked) {
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 1ce8d6ee21..ca44b7894f 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -3293,7 +3293,7 @@ static void add_tag_chain(const struct object_id *oid)
 
 	tag = lookup_tag(the_repository, oid);
 	while (1) {
-		if (!tag || parse_tag(tag) || !tag->tagged)
+		if (!tag || parse_tag(the_repository, tag) || !tag->tagged)
 			die(_("unable to pack objects reachable from tag %s"),
 			    oid_to_hex(oid));
 
diff --git a/builtin/tag.c b/builtin/tag.c
index 01eba90c5c..aeb04c487f 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -149,7 +149,7 @@ static int verify_tag(const char *name, const char *ref UNUSED,
 	if (format->format)
 		flags = GPG_VERIFY_OMIT_STATUS;
 
-	if (gpg_verify_tag(oid, name, flags))
+	if (gpg_verify_tag(the_repository, oid, name, flags))
 		return -1;
 
 	if (format->format)
diff --git a/builtin/verify-tag.c b/builtin/verify-tag.c
index 558121eaa1..4a261b2369 100644
--- a/builtin/verify-tag.c
+++ b/builtin/verify-tag.c
@@ -61,7 +61,7 @@ int cmd_verify_tag(int argc,
 			continue;
 		}
 
-		if (gpg_verify_tag(&oid, name, flags)) {
+		if (gpg_verify_tag(repo, &oid, name, flags)) {
 			had_error = 1;
 			continue;
 		}
diff --git a/fsck.c b/fsck.c
index 138fffded9..fae18d8561 100644
--- a/fsck.c
+++ b/fsck.c
@@ -474,7 +474,7 @@ static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *optio
 {
 	const char *name = fsck_get_object_name(options, &tag->object.oid);
 
-	if (parse_tag(tag))
+	if (parse_tag(the_repository, tag))
 		return -1;
 	if (name)
 		fsck_put_object_name(options, &tag->tagged->oid, "%s", name);
diff --git a/object-name.c b/object-name.c
index fed5de5153..8b862c124e 100644
--- a/object-name.c
+++ b/object-name.c
@@ -449,7 +449,7 @@ static int show_ambiguous_object(const struct object_id *oid, void *data)
 	} else if (type == OBJ_TAG) {
 		struct tag *tag = lookup_tag(ds->repo, oid);
 
-		if (!parse_tag(tag) && tag->tag) {
+		if (!parse_tag(ds->repo, tag) && tag->tag) {
 			/*
 			 * TRANSLATORS: This is a line of ambiguous
 			 * tag object output. E.g.:
diff --git a/ref-filter.c b/ref-filter.c
index d7454269e8..c318f9ca0e 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -2866,7 +2866,7 @@ static int match_points_at(struct oid_array *points_at,
 	while (obj && obj->type == OBJ_TAG) {
 		struct tag *tag = (struct tag *)obj;
 
-		if (parse_tag(tag) < 0) {
+		if (parse_tag(the_repository, tag) < 0) {
 			obj = NULL;
 			break;
 		}
diff --git a/tag.c b/tag.c
index f5c232d2f1..2f12e51024 100644
--- a/tag.c
+++ b/tag.c
@@ -1,4 +1,3 @@
-#define USE_THE_REPOSITORY_VARIABLE
 #define DISABLE_SIGN_COMPARE_WARNINGS
 
 #include "git-compat-util.h"
@@ -13,6 +12,7 @@
 #include "gpg-interface.h"
 #include "hex.h"
 #include "packfile.h"
+#include "repository.h"
 
 const char *tag_type = "tag";
 
@@ -44,28 +44,28 @@ static int run_gpg_verify(const char *buf, unsigned long size, unsigned flags)
 	return ret;
 }
 
-int gpg_verify_tag(const struct object_id *oid, const char *name_to_report,
-		unsigned flags)
+int gpg_verify_tag(struct repository *r, const struct object_id *oid,
+		   const char *name_to_report, unsigned flags)
 {
 	enum object_type type;
 	char *buf;
 	unsigned long size;
 	int ret;
 
-	type = odb_read_object_info(the_repository->objects, oid, NULL);
+	type = odb_read_object_info(r->objects, oid, NULL);
 	if (type != OBJ_TAG)
 		return error("%s: cannot verify a non-tag object of type %s.",
 				name_to_report ?
 				name_to_report :
-				repo_find_unique_abbrev(the_repository, oid, DEFAULT_ABBREV),
+				oid_to_hex(oid),
 				type_name(type));
 
-	buf = odb_read_object(the_repository->objects, oid, &type, &size);
+	buf = odb_read_object(r->objects, oid, &type, &size);
 	if (!buf)
 		return error("%s: unable to read file.",
 				name_to_report ?
 				name_to_report :
-				repo_find_unique_abbrev(the_repository, oid, DEFAULT_ABBREV));
+				oid_to_hex(oid));
 
 	ret = run_gpg_verify(buf, size, flags);
 
@@ -148,9 +148,11 @@ int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, u
 		FREE_AND_NULL(item->tag);
 	}
 
-	if (size < the_hash_algo->hexsz + 24)
+	if (size < r->hash_algo->hexsz + 24)
 		return -1;
-	if (memcmp("object ", bufptr, 7) || parse_oid_hex(bufptr + 7, &oid, &bufptr) || *bufptr++ != '\n')
+	if (memcmp("object ", bufptr, 7) ||
+	    parse_oid_hex_algop(bufptr + 7, &oid, &bufptr, r->hash_algo) ||
+	    *bufptr++ != '\n')
 		return -1;
 
 	if (!starts_with(bufptr, "type "))
@@ -201,7 +203,7 @@ int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, u
 	return 0;
 }
 
-int parse_tag(struct tag *item)
+int parse_tag(struct repository *r, struct tag *item)
 {
 	enum object_type type;
 	void *data;
@@ -210,8 +212,7 @@ int parse_tag(struct tag *item)
 
 	if (item->object.parsed)
 		return 0;
-	data = odb_read_object(the_repository->objects, &item->object.oid,
-			       &type, &size);
+	data = odb_read_object(r->objects, &item->object.oid, &type, &size);
 	if (!data)
 		return error("Could not read %s",
 			     oid_to_hex(&item->object.oid));
@@ -220,7 +221,7 @@ int parse_tag(struct tag *item)
 		return error("Object %s not a tag",
 			     oid_to_hex(&item->object.oid));
 	}
-	ret = parse_tag_buffer(the_repository, item, data, size);
+	ret = parse_tag_buffer(r, item, data, size);
 	free(data);
 	return ret;
 }
diff --git a/tag.h b/tag.h
index ef12a61037..534687c4ca 100644
--- a/tag.h
+++ b/tag.h
@@ -13,10 +13,10 @@ struct tag {
 };
 struct tag *lookup_tag(struct repository *r, const struct object_id *oid);
 int parse_tag_buffer(struct repository *r, struct tag *item, const void *data, unsigned long size);
-int parse_tag(struct tag *item);
+int parse_tag(struct repository *r, struct tag *item);
 void release_tag_memory(struct tag *t);
 struct object *deref_tag(struct repository *r, struct object *, const char *, int);
-int gpg_verify_tag(const struct object_id *oid,
+int gpg_verify_tag(struct repository *r, const struct object_id *oid,
 		   const char *name_to_report, unsigned flags);
 struct object_id *get_tagged_oid(struct tag *tag);
 
diff --git a/walker.c b/walker.c
index 409b646578..2891563b03 100644
--- a/walker.c
+++ b/walker.c
@@ -115,7 +115,7 @@ static int process_commit(struct walker *walker, struct commit *commit)
 
 static int process_tag(struct walker *walker, struct tag *tag)
 {
-	if (parse_tag(tag))
+	if (parse_tag(the_repository, tag))
 		return -1;
 	return process(walker, tag->tagged);
 }