The following command did the trick:
jk_cp -j /var/www/clients/client1/web1/ -o -v /usr/bin/git*
I also had to copy a few libraries that were missing but it might be because I tried a few things before (including a jail_update) that might have deleted them:
jk_cp -j /var/www/clients/client1/web1/ -o -v /lib/libpthread.so.0 /usr/lib/libpthread.so /lib64/libpthread.so.0 /usr/lib64/libpthread.so
Everything seems to be working just fine now, I'll got a play with my new toy a bit
Thanks again for the quick reply.