Here's the list of new and noteworthy pages for the various JGit releases.
Tentative Next Release
2.4 (planned for 2013-05-15)
Latest Release
2.3 (2013-02-21)
Older Releases
2.2 (2012-12-15)
2.1 (2012-09-26)
2.0 (2012-06-27)
1.3 (2012-02-15)
1.2 (2011-12-22)
1.1 (2011-09-21)
1.0
0.12 (2011-05-03)
0.11
0.10
0.9
0.8