How do you reverse the axis and set the zero position for a polar plot in Julia / Plots?

When using Julia / plots heatmap polar plot, the default zero position for the theta axis is or the right ("East") with the angle increasing counter-clockwise, as shown in this example.

How do you reverse the axis and set the zero position for a polar plot in Matplotlib?

I want to have the zero in the "North" position and have a clockwise orientation. How can I do this ?

Thanks