Detecting current directory in bash script

I am attempting to write a script that initializes my git hooks differently whether my git repo is a submodule or just a regular repository. It currently looks like this:

# Get to root directory of client repository
if [[ ":$PATH:" != *":.git/modules:"* ]]; then # Presumed not being used as a submodule
  cd ../../
else
  cd .. # cd into .git/modules/<nameOfSubmodule> (up one level from hooks)
  submoduleName=${PWD##*/} # Get submodule name from current directory
  cd ../../../$submoduleName  
fi

However in testing it seems to always take the else route even when I am in a submodule.

Is there something I am missing in this line for determining whether my path contains the expected characters?

if [[ ":$PATH:" != ":.git/modules:" ]]