Release: make sure release branch is available (2nd try) (#1069)
Release: make sure release branch is available (2nd try) (#1069)

* Release: make sure release branch is available (2nd try)

* Delete old git checkout cmd
bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration