Bash script to automatically pull git repo and generate documentation on remote gitolite server does not work

Question

On my gitolite I want to automatically generate documentation when a repository is updated. For that I generated a repo-specific hook that calls a bash script which either clones the repository and generates a documentation in it or if the directory already exists it pulls the updates and then generates documentation.

The remote hook gets called however git does not recognize the directory. It for some reason works in '.' and doesn't find a .git directory there (but it is there, because it cloned it in a script run before).

remote: + /home/git/check_jsdoc.sh kbc
remote: + reponame=kbc
remote: + echo 'Generating documentation for:' kbc
remote: Generating documentation for: kbc
remote: + jsdocdir=/home/git/jsdoc/
remote: + repodir=/home/git/jsdoc/kbc
remote: + test -d /home/git/jsdoc/kbc
remote: + echo '/home/git/jsdoc/kbc exists.'
remote: /home/git/jsdoc/kbc exists.
remote: + test -d /home/git/jsdoc/kbc/.git
remote: + git -C /home/git/jsdoc/kbc pull
remote: fatal: not a git repository: '.'
remote: + documentation build /home/git/jsdoc/kbc/src/App.js -f html -o /var/www/jsdoc/kbc
remote: + exit

Here is the script:

#!/bin/bash

set -x

reponame=$1

echo "Generating documentation for: ${reponame}"

jsdocdir="/home/git/jsdoc/"

repodir="${jsdocdir}${reponame}"

if test -d "$repodir"; then
    echo "${repodir} exists."

    if test -d "${repodir}/.git"; then
        git -C "$repodir" pull
    else
        echo "no .git in ${repodir}?"
    fi
else
    cd "$jsdocdir" || exit 1
    git clone gitolite:"$reponame"
    cd "$jsdocdir" || exit 1
fi

documentation build "${repodir}/src/App.js" -f html -o "/var/www/jsdoc/${reponame}"

when I run check_jsdoc.sh kbc locally, it works

git@gitserver:~$ ./check_jsdoc.sh kbc
+ reponame=kbc
+ echo 'Generating documentation for:' kbc
Generating documentation for: kbc
+ jsdocdir=/home/git/jsdoc/
+ repodir=/home/git/jsdoc/kbc
+ test -d /home/git/jsdoc/kbc
+ echo '/home/git/jsdoc/kbc exists.'
/home/git/jsdoc/kbc exists.
+ test -d /home/git/jsdoc/kbc/.git
+ git -C /home/git/jsdoc/kbc pull
remote: Enumerating objects: 5, done.
remote: Counting objects: 100% (5/5), done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 4 (delta 1), reused 1 (delta 0), pack-reused 0
Unpacking objects: 100% (4/4), 394 bytes | 394.00 KiB/s, done.
From gitolite:kbc
   b708b925..aa11c17d  master     -> origin/master
Updating b708b925..aa11c17d
Fast-forward
+ documentation build /home/git/jsdoc/kbc/src/App.js -f html -o /var/www/jsdoc/kbc