Permissão de gancho pós-recebimento negada como "incapaz de criar o arquivo"

Acabei de chegargitolite instalado no meu servidor e estou tentando obter umpost-receive gancho que pode apontar ogit dir na direção do apache.

Isso é o que meupost-receive gancho parece. Tem esse script doUsando o Git para gerenciar um site.

#!/bin/sh
echo "post-receive example.com triggered"
GIT_WORK_TREE=/srv/sites/example.com/public git checkout -f

Eu também tentei:

#!/bin/sh
echo "post-receive example.com triggered"
unset GIT_INDEX_FILE
export GIT_WORK_TREE=/srv/sites/example.com/public
export GIT_DIR=/home/git/repositories/example.com.git
git checkout -f

Esta é a resposta de erro que estou recebendo de voltagit push origin master da minha estação de trabalho local. Estes são arquivos de dentro do meu repositório.

remote: post-receive example.com triggered
remote: error: unable to create file .htaccess (Permission denied)
remote: error: unable to create file .tm_sync.config (Permission denied)
remote: fatal: cannot create directory at 'application': Permission denied

Erro de script autônomo

remote: sudo: no tty present and no askpass program specified
remote: Sorry, try again.
remote: sudo: no tty present and no askpass program specified
remote: Sorry, try again.
remote: sudo: no tty present and no askpass program specified
remote: Sorry, try again.
remote: sudo: 3 incorrect password attempts

Atualizar:

git@vannevar:~$ sudo -l
Matching Defaults entries for git on this host:
    env_reset, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin

User git may run the following commands on this host:
    (root) NOPASSWD: /usr/local/sbin/prgetsimpleappscom
git@vannevar:~$ /usr/local/sbin/prgetsimpleappscom
-su: /usr/local/sbin/prgetsimpleappscom: Permission denied
git@vannevar:~$ sh /usr/local/sbin/prgetsimpleappscom
post-receive getsimpleapps.com triggered
error: unable to unlink old 'application/config/development/database.php' (Permission denied)
error: unable to unlink old 'application/config/production/database.php' (Permission denied)
error: unable to unlink old 'application/config/quickbooks.php' (Permission denied)
git@vannevar:~$ sudo sh /usr/local/sbin/prgetsimpleappscom
[sudo] password for git: 
Sorry, user git is not allowed to execute '/bin/sh /usr/local/sbin/prgetsimpleappscom' as root on vannevar.
git@vannevar:~$ sudo /usr/local/sbin/prgetsimpleappscom
[sudo] password for git: 
sudo: /usr/local/sbin/prgetsimpleappscom: command not found
git@vannevar:~$ nano /usr/local/sbin/prgetsimpleappscom
git@vannevar:~$ 

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