Basically the same as the asterisk HOWTO.

Changes:

Initial clone is:

  git svn clone -s http://svn.asterisk.org/svn/dahdi/tools dahdi-tools

The .gitignore file is:

  cp ../asterisk-tools/dahdi-tools_gitignore .gitignore

And most importantly: cheating and not using menuselect at all:

  mkdir menuselect
  cp ../asterisk-tools/menuselect/Makefile menuselect
  ln -s /bin/true menuselect/menuselect