x509 Cert error when using a Git Channel which has internal CA

Issue

We have deployed a Channel in ACM with type Git that is pointing to a git repository with an internal CA. When we try to subscribe to the channel the subscription fails to propagate.

Looking at the multicluster-operators-hub-subscription pod logs we see:

I0914 20:42:12.230457       1 mcmhub_controller.go:297] MCM Hub Reconciling subscription: example-ns/example-subscription
I0914 20:42:12.230747       1 gitrepo_sync.go:75] Subscription example-subscription has Git type channel.
I0914 20:42:12.231053       1 gitrepo.go:120] Cloning https://git.example.com/example.git into /tmp/example-subscription/master
E0914 20:42:12.319289       1 gitrepo.go:124] Get https://git.example.com/example.git/info/refs?service=git-upload-pack: x509: certificate signed by unknown authorityFailed to git clone: Get https://git.example.com/example.git/info/refs?service=git-upload-pack: x509: certificate signed by unknown authority
E0914 20:42:12.319330       1 gitrepo_sync.go:91] Get https://git.example.com/example.git/info/refs?service=git-upload-pack: x509: certificate signed by unknown authority