Add commit hashes to the changelog entries

[codificat]

Related Issues and Dependencies

Resloves #150

This introduces a breaking change

No

This Pull Request implements

This adds short commit hashes to the changelog entries, by modifying the formatting string passed to git log from %s to %h %s

Description

Example output:

>>> from git import Repo
>>> from kebechet.managers.version.utils import _compute_changelog
>>> repo = Repo()
>>> from thoth.glyph import MLModel, Format
>>> changelog = _compute_changelog(repo, 'v1.7.3', 'HEAD', True, MLModel.DEFAULT.name, Format.DEFAULT.name, 'v1.7.3')
>>> for entry in changelog:
...     print(entry)
... 
### Features
* d1003c7 Add commit hashes to the changelog entries
* 8455bf8 :arrow_up: Automatic update of dependencies by Kebechet for the rhel-8 environment
* cd7fbf5 :arrow_up: Automatic update of dependencies by Kebechet for the rhel-8 environment
* 1268243 :medal_sports: set badges for easy access to content
* aec4de6 :arrow_up: Automatic update of dependencies by Kebechet for the rhel-8 environment
* 28b8f92 :arrow_up: Automatic update of dependencies by Kebechet for the rhel-8 environment
* 4f53d80 :arrow_up: Automatic update of dependencies by Kebechet for the rhel-8 environment (#984)
### Improvements
* f7177ee use consistent name for 'has_prev_release'

[sesheta]

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