Description of problem:
I tried to "fedpkg prep" libjpeg-turbo-compat" package but it failed with

Exception AttributeError: '_read_only' in <bound method write.__del__ of <git.config.write object at 0x20ff980>> ignored

error.

Version-Release number of selected component (if applicable):
fedpkg-1.11-1.fc18.noarch

How reproducible:
always

Steps to Reproduce:
[atkac@traged git-fedora]$ fedpkg clone libjpeg-turbo-compat
Cloning into 'libjpeg-turbo-compat'...
remote: Counting objects: 9, done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 9 (delta 0), reused 0 (delta 0)
Receiving objects: 100% (9/9), done.
[atkac@traged git-fedora]$ cd libjpeg-turbo-compat/
[atkac@traged libjpeg-turbo-compat]$ fedpkg prep
Downloading libjpeg-turbo-1.2.1.tar.gz
Exception AttributeError: '_read_only' in <bound method write.__del__ of <git.config.write object at 0x20ff980>> ignored

Actual results:
fedpkg fails to download tar.gz and "prep" the package

Expected results:
fedpkg successfully "preps" the pkg