Say you have a project with many repos and you can run this scripts to pull all git repos inside a folder

pull-git-folders.sh

#!/bin/sh

red=`tput setaf 1`
green=`tput setaf 2`
reset=`tput sgr0`

echo_green()
{
  echo "${green}$1${reset}"
}

echo_red()
{
  echo "${red}$1${reset}"
}

arr=($(ls -d */))

for i in "${arr[@]}"
do
   # do whatever on $i
   echo_green "Processing $i..."
   cd $i
   echo_green "Stashing..."
   git stash
   cbranch=$(git branch | grep \* | cut -d ' ' -f2)
   echo_green "Checkout to master..."
   git checkout master
   echo_green "Pull latest commit(s).."
   git pull
   echo_green "Check out to ${cbranch} and Unstashing..."
   git checkout $cbranch
   git stash pop
   cd ..
   echo_red "------------------------------"
done