public class HostedWorker : BackgroundService
{
    private readonly IServiceScopeFactory scopeFactory;

    public HostedWorker(IServiceScopeFactory scopeFactory)
    {
        this.scopeFactory = scopeFactory;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        using (var scope = scopeFactory.CreateScope())
        {
            var database = scope.ServiceProvider
                .GetRequiredService<DatabaseContext>();
            var entity = database.GetSomeEntity();
            scope.ServiceProvider
                .GetRequiredService<ISomeScopedService>()
                .DoSomethingWithTheEntity(entity)
        }
    }
}

public class SomeScopedService: ISomeScopedService
{
    private readonly DatabaseContext context;

    public SomeScopedService(DatabaseContext context)
    {
        this.context = context;
    }

    public void DoSomethingWithTheEntity(SomeEntity entity)
    {
        // the context doesn't track the entity
    }
}