Branches won't update / syn

Hi there!

I’m using atom 1.52.0. I have created new branches and deleted old ones on the git hub web site. Unfortunately, atom won’t sync the deleted branches. I can still use the picker to switch, When trying to fetch the branch after switching, an error message tells me that atom cannot find the branch (which is correct).

How can I update / sync the remote branches locally?

Cheers,

BITS-Editor