git: use full sha
git: use full sha

With bigger projects possibility of short id is very possible
and we really don't want that to happen, so lets use full sha
from now on.

Fixes #229

Signed-off-by: Ruslan Kuprieiev <f6538312ce47017d734b1357aabc970ebf896e32@gmail.com>

dmpetrov/dataversioncontrol,efiop/dvc,dmpetrov/dataversioncontrol,dataversioncontrol/dvc,efiop/dvc,dataversioncontrol/dvc