Pulling docker image ubuntu:16.04 ... Using docker image sha256:b0ef3016420a4052400d0a36f5144ebdee5d358ef6942afee072517b5a94168c for ubuntu:16.04 ... Running on runner-1a2fc9c4-project-4137-concurrent-0 via gitlabrunner... Fetching changes... Removing build/ HEAD is now at 8027fb9 Merge branch 'rc-1.0.0' into 'master' Checking out c6fb47f9 as issue/608... fatal: reference is not a tree: c6fb47f935753ee084473b6a3a659bd338d7c543 ERROR: Job failed: exit code 1
