FetchIntoObjectPool: pack refs after fetch

changelogs/unreleased/jv-pack-pool-refs.yml

+---
+title: 'FetchIntoObjectPool: pack refs after fetch'
+merge_request: 1464
+author:
+type: performance

internal/git/objectpool/fetch.go

@@ -79,6 +79,14 @@ func (o *ObjectPool) FetchFromOrigin(ctx context.Context, origin *gitalypb.Repos
 		return err
 	}
 
+	packRefs, err := git.Command(ctx, o, "pack-refs", "--all")
+	if err != nil {
+		return err
+	}
+	if err := packRefs.Wait(); err != nil {
+		return err
+	}
+
 	return repackPool(ctx, o)
 }
 

internal/git/objectpool/fetch_test.go

@@ -182,6 +182,10 @@ func TestFetchFromOriginRefUpdates(t *testing.T) {
 	for ref, oid := range newRefs {
 		require.Equal(t, oid, resolveRef(t, poolPath, "refs/remotes/origin/"+ref), "look up %q in pool after update", ref)
 	}
+
+	looseRefs := testhelper.MustRunCommand(t, nil, "find", filepath.Join(poolPath, "refs"), "-type", "f")
+	require.Equal(t, "", string(looseRefs), "there should be no loose refs after the fetch")
+
 }
 
 func resolveRef(t *testing.T, repo string, ref string) string {