Fail to clone github repo on the host machine

Your host key can be invalidated due to OS re-installation or IP address re-assign. If that’s the case, you must refresh known_hosts file.

sudo su - dokku # become dokku user
ssh-keygen -R github.com # delete github.com entry
ssh -T git@github.com # verify ssh connection

You will see a successful build after you run the CI build. such as Github Action.

discussion