commit 49a4d17a5dfdfc8fca6e62cb9564d24adec418c9
Author: J. Fernando Sánchez <balkian@gmail.com>
Date:   Fri Feb 27 08:55:03 2015 -0800

diff --git a/gistfile1.sh b/gistfile1.sh
new file mode 100644
index 0000000..a956039
--- /dev/null
+++ b/gistfile1.sh
@@ -0,0 +1,3 @@
+git clone <your_project> <your_submodule>
+cd <your_submodule>
+git filter-branch --subdirectory-filter 'path/to/your/submodule' --prune-empty -- --all
\ No newline at end of file