Waiting for services to be up and running... Pulling docker image ubuntu:16.04 ... Using docker image sha256:5f2bf26e35249d8b47f002045c57b2ea9d8ba68704f45f3c209182a7a2a9ece5 for ubuntu:16.04 ... Running on runner-1a2fc9c4-project-3260-concurrent-1 via gitlabrunner... Reinitialized existing Git repository in /builds/adega/adega/.git/ Fetching changes... Checking out 7c0c8965 as 200-identificar-provaveis-formandos... fatal: reference is not a tree: 7c0c8965ff8c065a53f19f18a6e01a46e46abe33 ERROR: Job failed: exit code 1