git-annex sync does not push

sync-doesnot-push.sh

#!/bin/sh -x

set -e ; set -u
export LC_ALL=C

d=$(pwd)

# cleanup
chmod a+rwx -R REPO pc1 || true
rm -Rf REPO pc1

# create central git repo
mkdir -p REPO/Docs.git
cd REPO/Docs.git
git init --bare
cd $d

# populate repo in PC1
mkdir -p pc1/Docs
cd pc1/Docs
echo AAA > fileA
echo BBB > fileB

git init
git remote add origin $d/REPO/Docs.git
git fetch --all

git annex init "pc1"
git annex info

git annex direct
git annex sync

git annex add .
git annex sync

find $d/REPO/Docs.git/refs

# there should be many branches inside refs