After careful deliberation, the Git Migration Team has decided to postpone launch one week to Thursday, February 24 at 3pm PST to allow time for final server configuration and additional testing.*
All the the individual components involved in the Git migration have been tested in the staging environment but bringing them together on the production hardware has taken longer than we allowed for. The team agreed we would all feel much more comfortable with a buffer of at least two full days of uninterrupted community testing prior to deployment.
Thanks very much for your patience and understanding. Please keep your eyes on the Git Migration Community Testing Wiki and https://twitter.com/drupalgitgremln for further developments and for information on how you can help.
* An indispensable team member is currently scheduled for jury duty next week; if he is selected, we may need to make some additional adjustments.