[pgjdbc/pgjdbc] 0568d0: test: Fix git hash emptiness check in postgres-hea...

  Branch: refs/heads/master
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: 0568d07a2ec8e09ce17cbaa36fa0299540c28373
      https://github.com/pgjdbc/pgjdbc/commit/0568d07a2ec8e09ce17cbaa36fa0299540c28373
  Author: Sehrope Sarkuni < >
  Date:   2021-05-26 (Wed, 26 May 2021)

  Changed paths:
    M docker/postgres-head/Dockerfile

  Log Message:
  -----------
  test: Fix git hash emptiness check in postgres-head Dockerfile