<exec>'s dir attribute not usable in derived macros

[snktagarwal]

I am working on a project where I had cloned your repo for the build.xml file. Though most scripts do not like to work in git dir's themselves. Though it is a better idea to give exec the dir attribute to effectively switch directories. Or effectively give git --git-dir. Your code exposes the dir attribute of exec only in the "git" macro, you should change other macros to include "dir" attribute and then maybe trickle them down to "git" command itself.

[snktagarwal]

Similarly goes for options,