Add commit hash to the ouput

[tosiara]

Currently there is no way to know which revision has caused the leak.
For example:

--------------------------------------------------------------------------------
                     gittyleaks' Bot Detective at work ...                      
--------------------------------------------------------------------------------
file: 2.c
what: user
value: admin;
match:
    user=admin;
num_of_revisions: 1
----------------------------------------
file: 3.c
what: user
value: admin;
match:
    user=admin;
num_of_revisions: 1
----------------------------------------
file: 3.c
what: password
value: 1234;
match:
    password=1234;
num_of_revisions: 1
----------------------------------------
file: 2.c
what: password
value: 1234;
match:
    password=1234;
num_of_revisions: 1
----------------------------------------

$ ls
3.c

As you can see, the file 2.c has been reported, but it is no longer in the tree. If there was git commit's SHA1 in the output - it would be easier to track when and who leaked the secret

Thanks