Get batch_start_time and batch_end_time as jinja vars (Snowflake core)

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The problem I’m having

I need to create a date spline from the batch start to to the batch end per batch

The context of why I’m trying to do this

I am working on a model that does per second calculations, we need to do them in 1 hour intervals for query performance.

What I’ve already tried

I tried using the variables the actual macro uses, for example

{{model.config.__dbt_internal_microbatch_event_time_start}}

For example

                SELECT TIMEADD('second', seq4() ,{{model.config.__dbt_internal_microbatch_event_time_start}})
                FROM TABLE(GENERATOR(ROWCOUNT => 3600)
                order by activity_date asc, activity_time asc;

But this does not work just gives me a compilation error. I added a feature request to get official variables for these, in the mean time, how can I access these in my model code?