"Exception Cmd('git') failed due to:" - not trigegring try:except

[rusnackor]

Hello guys.

I am preparing scrip that is meant to pull/checkout more repositories in different directories.
However, soemtimes can happen this:

Exception Cmd('git') failed due to: exit code(1)
  cmdline: git pull -v origin
  stderr: 'error: Your local changes to the following files would be overwritten by merge:
        common_logic.py
        git_jobs.py
        svn_jobs.py
        test_updating.py
        updater.py
        updater_core.py
        updating_conf.py
        updating_consts.py
Please commit your changes or stash them before you merge.
Aborting'

But when I try to put my code into try:except block, like this:

import git

try:
    repo = git.Repo("/path/to/my/repo")
    o = repo.remotes.origin
    result = o.pull()
    for item in result:
        print("Item : {}".format(item))
except Exception as e:
    print("Exception {}".format(e))

Nothing changes, the script still throws exception and fails. Is it possible to cover this case, and make it not to crash?

PS: Is it possible to make it, that it does not ask me for credentials every time? (like put them inside of my code)