Waiting for services to be up and running...
Pulling docker image docker:stable ...
Using docker image sha256:fd7e073eb60f300c2e6c7e4035e23fff313c3a72f73c704a52095f0db736e62e for docker:stable ...
section_start:1540469654:prepare_script
Running on runner-a334e492-project-1975139-concurrent-0 via runner-a334e492-gitlab-runner-autoscale-1540462621-90f1d2f6...
section_end:1540469655:prepare_script
section_start:1540469655:get_sources
Fetching changes...
HEAD is now at 09b534f5 docs: Add helpful notes to artifact server configuration instructions
Checking out ba0e3c4d as jennis/patch_remote_cache_docs...
fatal: reference is not a tree: ba0e3c4df68c4db274418c1dcc2e416881315f9c
section_end:1540469657:get_sources
section_start:1540469657:upload_artifacts_on_failure
section_end:1540469658:upload_artifacts_on_failure
ERROR: Job failed: exit code 1