Log Message:
py-gitpython: updated to 3.1.27

3.1.27
- Reduced startup time due to optimized imports.

See the following for all changes.
https://github.com/gitpython-developers/gitpython/milestone/57?closed=1

3.1.26
- Fixes a leaked file descriptor when reading the index, which would cause make \ 
writing a previously
  read index on windows impossible.
  See https://github.com/gitpython-developers/GitPython/issues/1395 for details.

See the following for all changes.
https://github.com/gitpython-developers/gitpython/milestone/56?closed=1

3.1.25
See the following for all changes.
https://github.com/gitpython-developers/gitpython/milestone/55?closed=1

3.1.24
* Newly added timeout flag is not be enabled by default, and was renamed to \ 
kill_after_timeout