Rate limiting when deleting branches and remotes

[Tyriar]

Related: https://github.com/microsoft/vscode-pull-request-github/issues/6050

I'm trying to delete a lot of branches and remotes:

From the logs it looks like I'm quickly being rate limited without user feedback:

delete.log

Additionally eventually (3-5 minutes later?) I got this error:

[Tyriar]

When I try again I see it only got through a small amount of branches:

[alexr00]

This is happening because of a git related file being locked.

[andreamah]

Can this be repro-ed with just one branch? Are there minimal repro steps for this?