The web page http://tools.android.com/download/adt-20-preview
new ADT 20 preview2 available today. The section on downloads shows
how to get the adt20-preview2.zip binary.
The last line of this section still says
The source code is available in the Android Git repository, using
SDK changeset 6b80c7f80e5a13cec02e649d7dbf7e1b90f7f364.
which is an April 17 snapshot for the preview1 release.
Please add another line showing the preview2 snapshot changeset.
I presume that all changes between preview1 and preview2 are local to
the sdk.git project, with no dependencies on recent changes to build