This can be run using:

 $ ./mach try --preset builds

The build list can be filtered further using '-xq', e.g:

$ ./mach try --preset builds -xq "win"

Or it can be filtered further interactively:

$ ./mach try --preset builds -xi

Finally, tasks can be added to the build list:

$ ./mach try --preset builds -q "'windows 'mochitest"

This gives a T-style push. There is currently no way to both filter builds and
add additional tasks, it needs to be one or the other.

https://hg.mozilla.org/mozilla-central/rev/a53770e59a79