Ssh config for Jenkins when using helm and k8s

Question

So I have a k8s cluster and I am trying to deploy Jenkins using the following repo https://github.com/jenkinsci/helm-charts.

The main issue is I am working behind a proxy and when git tried to pull (using the ssh protocol) it is failing.

I am able to get around this by building my own docker image from the provided, installing socat and using the following .ssh/config in the container:

Host my.git.repo
  # LogLevel DEBUG
  StrictHostKeyChecking no
  ProxyCommand /usr/bin/socat - PROXY:$HOST_PROXY:%h:%p,proxyport=3128

Is there a better way to do this, I was hoping to use the provided image and perhaps have a plugin thast allowed something similar, but everywhere I look I can't seem to find anything.

Thanks for the help.