[Feature Request] On demand VSO secret refresh

[wiwwo]

Is your feature request related to a problem? Please describe.
I use VSO to synchronize vault secrets to K8S secrets.
I use static secrets, which are refreshed every T time.
I don't need that, i just want to refresh my secrets in vault and be allowed to tell VSO "ok, now refresh!".
What I do now (in K8S) is delete the pod, but... I mean.... ugly, dangerous, etc.

Describe the solution you'd like
Provide a command line option to tell VSO "refresh secrets now, please"

Describe alternatives you've considered
As said, delete pod. Ugly

Additional context
Related/close friend to #342