Strange. Maybe a hook script?
GIT_TRACE=1 git commit -m "my commit message"
should reveal the culprit, I hope.
If it doesn't, playing with "strace" may help (like:
strace -f -e clone,execve git commit -m foobar ).
--
Matthieu Moy
http://www-verimag.imag.fr/~moy/