Run git pull from a shell start-up script

Question

I have Raspberry Pi that loads a shell script on start up.

This script runs a python script, boot_camera.py, which is found in a repository.

I Have a server which sends the Raspberry Pi a command to issue a git pull command. The git pull command fails when the boot_camera.py is loaded on start-up.

However when I load the 'boot_camera.py' script manually after connecting with ssh the git pull command is executed successfully.

At first I thought the problem was with having to use 'sudo' permissions to run the command, so I used this solution which fixed the problem:

>>>Solution to not using sudo<<<

But when the script is booted on start-up the pull command still fails.

Update: This is the script that sets up the boot script:

sudo cp bootCameraModule.sh /etc/init.d/
sudo update-rc.d bootCameraModule.sh defaults

And this is the script itself:

case "$1" in
start)
    echo "Starting camera"
    . /home/pi/.virtualenvs/env/bin/activate
    # run application
    cd /home/pi/rpi-repo/rpi/
    python boot_camera.py &
 ;;
stop)
    echo "Stopping camera"
    # kill application
    sudo killall camera
;;
*)
    echo "Usage: /etc/init.d/bootCameraModule {start|stop}"
    exit 1
;;
esac

exit 0