Create a bare git repository which allows pushing from other users of the same user group.

create_bare_git.sh

#!/bin/bash
# usage ./create_bare_git.sh ProjectName

git init --bare --shared=group "$1.git"

LAST_USERGROUP=`groups | awk '{ print $NF }'`
# CURRENT_DIR=`pwd`
CURRENT_DIR=`realpath .`

chgrp -R $LAST_USERGROUP "$1.git"

echo "use this to set remote the first time:"
echo
echo "git remote add origin `hostname -f`:$CURRENT_DIR/$1.git"
echo "git push --set-upstream origin master"

echo "use this to change the remote of an existing project:"
echo
echo "git remote set-url origin `hostname -f`:$CURRENT_DIR/$1.git"
echo "git push --set-upstream origin master"

echo "use this to checkout the new repository:"
echo
echo "git clone `hostname -f`:$CURRENT_DIR/$1.git"