Skipping Git submodules setup$ # Auto DevOps variables and functions # collapsed multi-line command$ /build/build.shBuilding Heroku-based application using gliderlabs/herokuish docker image...invalid reference formatinvalid reference formatinvalid argument "/master:fcfc93d0389366c812a37dfc55954744f52c8f0e" for "-t, --tag" flag: invalid reference formatSee 'docker build --help'.ERROR: Job failed: exit code 1