Since updating to 8.1 CI builds fail with not found error

Since updating to GitLab 8.1 I get the following errors on my CI builds... the upgrade guide did not mention anything about changing anything in the runner config so I assume nothing has changed?

gitlab-ci-multi-runner 0.6.0 (4c26bc5)
Using Docker executor with image tetraweb/php:5.5-cli ...
Pulling docker image tetraweb/php:5.5-cli ...
Running on runner-df0844d9-project-3-concurrent-0 via node1-runner-ci-example-com...

Fetching changes...
fatal: repository 'https://gitlab-ci-token:xxxxxx@git.example.com/example/example.git/' not found

ERROR: Build failed with: exit code 1

If I can provide more info to debug this please let me know!