diff --git a/models/git/branch_list.go b/models/git/branch_list.go
index 980bd7b4c9..493611f217 100644
--- a/models/git/branch_list.go
+++ b/models/git/branch_list.go
@@ -116,6 +116,9 @@ func FindBranchNames(ctx context.Context, opts FindBranchOptions) ([]string, err
 }
 
 func FindBranchesByRepoAndBranchName(ctx context.Context, repoBranches map[int64]string) (map[int64]string, error) {
+	if len(repoBranches) == 0 {
+		return nil, nil
+	}
 	cond := builder.NewCond()
 	for repoID, branchName := range repoBranches {
 		cond = cond.Or(builder.And(builder.Eq{"repo_id": repoID}, builder.Eq{"name": branchName}))
diff --git a/models/git/branch_test.go b/models/git/branch_test.go
index b8ea663e81..3aa578f44b 100644
--- a/models/git/branch_test.go
+++ b/models/git/branch_test.go
@@ -183,3 +183,12 @@ func TestOnlyGetDeletedBranchOnCorrectRepo(t *testing.T) {
 	assert.NoError(t, err)
 	assert.NotNil(t, deletedBranch)
 }
+
+func TestFindBranchesByRepoAndBranchName(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	// With no repos or branches given, we find no branches.
+	branches, err := git_model.FindBranchesByRepoAndBranchName(db.DefaultContext, map[int64]string{})
+	assert.NoError(t, err)
+	assert.Len(t, branches, 0)
+}
diff --git a/release-notes/8.0.0/fix/3570.md b/release-notes/8.0.0/fix/3570.md
new file mode 100644
index 0000000000..1e860eb958
--- /dev/null
+++ b/release-notes/8.0.0/fix/3570.md
@@ -0,0 +1 @@
+Fixed an issue that resulted in excessive and unnecessary database queries when a user with no repositories was viewing their dashboard.