private static String createGoodHash(char character) {
    StringBuilder goodHashBuffer = new StringBuilder(64);
    for (int i = 0; i < 64; i++) {
      goodHashBuffer.append(character);
    }
    return goodHashBuffer.toString();
  }
Creates a 32 byte hexademical string to fit valid hash pattern.
jib-core/src/test/java/com/google/cloud/tools/jib/api/DescriptorDigestTest.java