I'm guessing but Issue appears to be in the version of jgit you're linked against.
I was unable to reproduce checking out (on a desktop) with org.eclipse.jgit.pgm-3.6.2.201501210735-r.sh
from here:
http://eclipse.org/jgit/download/
repository I was trying to clone:
https://github.com/trentm/json
screenshot of (first part of) stack trace:

Issue was experienced on a stock T-Mobile G2 w/ 2.3.4. Version of your software was 1.1 (latest available for this version of Android).
Happy to provide rest of stacktrace if needed.
I'm guessing but Issue appears to be in the version of jgit you're linked against.
I was unable to reproduce checking out (on a desktop) with org.eclipse.jgit.pgm-3.6.2.201501210735-r.sh
from here:
http://eclipse.org/jgit/download/
repository I was trying to clone:
https://github.com/trentm/json
screenshot of (first part of) stack trace:
Issue was experienced on a stock T-Mobile G2 w/ 2.3.4. Version of your software was 1.1 (latest available for this version of Android).
Happy to provide rest of stacktrace if needed.