Thanks for the patch.
Woops, no, I take that back, git is still missing from the jailkit chroot even though I added git to the Server Config section for jailkit. SSH works back out from the server though.
The settings there affect only new jails. a jail is created when the first jailed user is added to a website. If you like to test the new settings, create a new site and then a new jailed user. There is currently no funktion to update a jail yet from ispconfig, but jailkit offers tools for that if I remember correctly.
Btw, we decided to give github a try. Is there someone with experince in converting a complete svn repository incl. tags and branches to git which might be able to help out?