### ValueError on iBug/DeepSea at 2019-07-25T10:15:04Z: not enough values to unpack (expected 2, got 1)
File "/home/smokey/SmokeDetector/gitmanager.py", line 91, in add_to_blacklist
status, message = cls.prepare_git_for_operation(blacklist_file_name)
File "/home/smokey/SmokeDetector/gitmanager.py", line 321, in prepare_git_for_operation
git.checkout('master')
File "/usr/local/lib/python3.7/site-packages/sh.py", line 1427, in __call__
return RunningCommand(cmd, call_args, stdin, stdout, stderr)
File "/usr/local/lib/python3.7/site-packages/sh.py", line 767, in __init__