cd /path/to/m-c
# Before {{bug|1507524}} lands git format-patch -pk --relative=gfx BASE_REVISION gfx/webrender gfx/webrender_api # After {{bug|1507524}} lands git format-patch -pk --relative=gfx/wr BASE_REVISION gfx/wr
cd /path/to/webrender
git checkout -b my_branch