In [8]: tag
Out[8]: <git.TagReference "refs/tags/PROMOTED_1501131729_MKT15_01_12_QU_1">

In [9]: tag.object.hexsha
Out[9]: u'dca63c5c7e6aab3cd4934e60230ec3419ab87071'

In [12]: tag.name
Out[12]: 'PROMOTED_1501131729_MKT15_01_12_QU_1'

In [13]: tag.object
Out[13]: <git.TagObject "dca63c5c7e6aab3cd4934e60230ec3419ab87071">

In [14]: tag.ref
TypeError: PROMOTED_1501131729_MKT15_01_12_QU_1 is a detached symbolic reference as it points to 'dca63c5c7e6aab3cd4934e60230ec3419ab87071'

In [15]: tag.commit
---------------------------------------------------------------------------
UnicodeDecodeError                        Traceback (most recent call last)
<ipython-input-15-2431a6e80cf9> in <module>()
----> 1 tag.commit

/home/mdione/local/lib/python2.7/site-packages/git/refs/tag.pyc in commit(self)
     29         elif obj.type == "tag":
     30             # it is a tag object which carries the commit as an object - we can point to anything
---> 31             return obj.object
     32         else:
     33             raise ValueError("Tag %s points to a Blob or Tree - have never seen that before" % self)

/home/mdione/local/lib/python2.7/site-packages/gitdb/util.pyc in __getattr__(self, attr)
--> 237         self._set_cache_(attr)
    238         # will raise in case the cache was not created
    239         return object.__getattribute__(self, attr)

/home/mdione/local/lib/python2.7/site-packages/git/objects/tag.pyc in _set_cache_(self, attr)
     54         if attr in TagObject.__slots__:
     55             ostream = self.repo.odb.stream(self.binsha)
---> 56             lines = ostream.read().decode(defenc).splitlines()
     57
     58             obj, hexsha = lines[0].split(" ")       # object <hexsha>

/usr/lib/python2.7/encodings/utf_8.pyc in decode(input, errors)
     14
     15 def decode(input, errors='strict'):
---> 16     return codecs.utf_8_decode(input, errors, True)
     17
     18 class IncrementalEncoder(codecs.IncrementalEncoder):

UnicodeDecodeError: 'utf8' codec can't decode byte 0xa8 in position 108: invalid start byte