On the GKEOP cluster
kubectl create secret generic git-creds \
--namespace=config-management-system \
--from-file=ssh=/path/to/[KEYPAIR-PRIVATE-KEY-FILENAME]
kubectl apply -f - <<EOF
apiVersion: configmanagement.gke.io/v1
kind: ConfigManagement
metadata:
name: config-management
spec:
clusterName: arctiqtim
git:
syncRepo: git@github.com:arctiqtim/acm-test.git
syncBranch: master
secretType: ssh
EOF