Fix CI jobs to work with Gitlab CI "fetch" mode
which is the new default (used to be "clone" long time ago)
See https://docs.gitlab.com/ee/ci/pipelines/settings.html#git-strategy
GitLab jobs artifacts no longer stored forever as of Monday, November 4th 08:30h. Further information under https://cern.ch/otg0152576
which is the new default (used to be "clone" long time ago)
See https://docs.gitlab.com/ee/ci/pipelines/settings.html#git-strategy