Fix conda build CI issue with git commands.

[0mdc]

Motivation and Context

This fixes an ongoing CI issue with Linux conda_build_binaries that was probably caused by an automated update of a git dependency.

Error:

Traceback (most recent call last):
  File "/remote/habitat-sim/conda-build/matrix_builder.py", line 160, in <module>
    main()
  File "/remote/habitat-sim/conda-build/matrix_builder.py", line 142, in main
    sha = repo.head.object.hexsha
  File "/opt/conda/envs/py39/lib/python3.9/site-packages/git/refs/symbolic.py", line 219, in _get_object
    return Object.new_from_sha(self.repo, hex_to_bin(self.dereference_recursive(self.repo, self.path)))
  File "/opt/conda/envs/py39/lib/python3.9/site-packages/git/objects/base.py", line 94, in new_from_sha
    oinfo = repo.odb.info(sha1)
  File "/opt/conda/envs/py39/lib/python3.9/site-packages/git/db.py", line 40, in info
    hexsha, typename, size = self._git.get_object_header(bin_to_hex(binsha))
  File "/opt/conda/envs/py39/lib/python3.9/site-packages/git/cmd.py", line 1383, in get_object_header
    return self.__get_object_header(cmd, ref)
  File "/opt/conda/envs/py39/lib/python3.9/site-packages/git/cmd.py", line 1370, in __get_object_header
    return self._parse_object_header(cmd.stdout.readline())
  File "/opt/conda/envs/py39/lib/python3.9/site-packages/git/cmd.py", line 1329, in _parse_object_header
    raise ValueError("SHA could not be resolved, git returned: %r" % (header_line.strip()))
ValueError: SHA could not be resolved, git returned: b''

How Has This Been Tested

Tested on CI.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have completed my CLA (see CONTRIBUTING)
• I have added tests to cover my changes.
• All new and existing tests passed.

[jturner65]

Awesome! LGTM