git-show

Showing a commit

$ git show d370f56
>>> repo = pygit2.Repository('/path/to/repository')
>>> commit = repo.revparse_single('d370f56')

Show log message

>>> message = commit.message

Show SHA hash

>>> hash = commit.hex

Show diff

>>> diff = repo.diff(commit.parents[0], commit)

Show all files in commit

>>> for e in commit.tree:
>>>     print(e.name)

Produce something like a git show message

Then you can make your message:

>>> from datetime import datetime, timezone, timedelta
>>> tzinfo  = timezone( timedelta(minutes=commit.author.offset) )
>>>
>>> dt      = datetime.fromtimestamp(float(commit.author.time), tzinfo)
>>> timestr = dt.strftime('%c %z')
>>> msg     = '\n'.join(['commit {}'.format(commit.tree_id.hex),
...                      'Author: {} <{}>'.format(commit.author.name, commit.author.email),
...                      'Date:   {}'.format(timestr),
...                      '',
...                      commit.message])

References