Backup/sync files using git

Hi folks,
for my personal work I need to have an application to manage file/directory backups and syncronization form e PCs and a shared network disk. On the net disk I would have a git repository so I can have an history of the backups.
Anybody knows if exist an application like that?
Best regards,

begin:vcard
fn:Massimo Manca
n:Manca;Massimo
org:Micron Engineering di Massimo Manca adr:;;via della Ferriera, 48;Pordenone;PN;33170;ITALIA email;internet:[email protected] tel;work:+39 0434 1856131
tel;fax:+39 0434 1851032 / 178 273 3543 tel;cell:+39 349 4504979 url:http://www.micronengineering.it version:2.1
end:vcard