1) I can't locate the git command to tell you exactly what you have
checked out.
Use `git describe'. Ideally, PCB should show the git version in
--version output, like gnetlist does if you're running unstable:
$ gnetlist --version
gEDA 1.7.0 (g09c6613)
Copyright (C) 1998-2011 gEDA developers
This is free software, and you are welcome to redistribute it under
certain conditions. For details, see the file `COPYING', which is
included in the gEDA distribution.
There is NO WARRANTY, to the extent permitted by law.