juju-deployer -c default.yaml -d -b trusty-liberty
2015-11-06 14:24:28 [DEBUG] deployer.cli: Using runtime GoEnvironment on beretstack
2015-11-06 14:24:28 [INFO] deployer.cli: Starting deployment of trusty-liberty
2015-11-06 14:24:28 [DEBUG] deployer.import: Getting charms...
2015-11-06 14:24:28 [DEBUG] deployer.charm:  Branching charm https://github.com/openstack-charmers/charm-ceilometer @ trusty/ceilometer
2015-11-06 14:24:30 [ERROR] deployer.charm: Could not update branch trusty/ceilometer from https://github.com/openstack-charmers/charm-ceilometer

 fatal: ambiguous argument 'stable': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'

2015-11-06 14:24:30 [INFO] deployer.cli: Deployment stopped. run time: 1.68