ksur@11acdc52a906:/tpcc/tpcc-course-2020/tasks/0-intro/echo$ tpcc push
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Hello, ksur!

Command running: ['push'], cwd: /tpcc/tpcc-course-2020/tasks/0-intro/echo
Platform: Linux-5.3.0-42-generic-x86_64-with-Ubuntu-18.04-bionic
C++ compiler: /usr/bin/clang++-8 (clang version 8.0.0-3~ubuntu18.04.2 (tags/RELEASE_800/final))
Python: 3.6.9, CPython, /tpcc/tpcc-course-2020/client/venv/bin/python
Repository root directory: /tpcc/tpcc-course-2020
Git current commit: c7d964a77a5fe50d973214e38efddf467bf08f3f

Moving to repo /tpcc/822-dmitry-surnin-u-d1masi1k
Running git: ['checkout', '0-intro/echo']
Running git: ['push', 'origin', '0-intro/echo']
error: src refspec 0-intro/echo does not match any.
error: failed to push some refs to 'https://gitlab.com/mipt-tpcc-course-2020/822-dmitry-surnin-u-d1masi1k'

Command '['git', 'push', 'origin', '0-intro/echo']' returned non-zero exit status 1.
Traceback (most recent call last):
  File "/tpcc/tpcc-course-2020/client/client.py", line 323, in main
    args.cmd(args)
  File "/tpcc/tpcc-course-2020/client/client.py", line 192, in push_command
    client.push_commits(current_task)
  File "/tpcc/tpcc-course-2020/client/tpcc/course.py", line 334, in push_commits
    self.solutions.push(task)
  File "/tpcc/tpcc-course-2020/client/tpcc/solutions.py", line 247, in push
    self._git(["push", "origin", task_branch], cwd=self.repo_dir)
  File "/tpcc/tpcc-course-2020/client/tpcc/solutions.py", line 151, in _git
    subprocess.check_call(["git"] + cmd, **kwargs)
  File "/usr/lib/python3.6/subprocess.py", line 311, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['git', 'push', 'origin', '0-intro/echo']' returned non-zero exit status 1.