Command:

$ /usr/local/CrossPack-AVR/bin/avrdude -P usb -c avrisp2 -p m644p -qq -U lfuser:r:/tmp/LOW.tmp:h  -B 1

Result:

avrdude: Yikes!  Invalid device signature.
         Double check connections and try again, or use -F to override
         this check.

So try to increase the bit clock period for the JTAG interface with the -B option

Command:

$ /usr/local/CrossPack-AVR/bin/avrdude -P usb -c avrisp2 -p m644p -qq -U lfuser:r:/tmp/LOW.tmp:h  -B 10

Result:

$ /usr/local/CrossPack-AVR/bin/avrdude -P usb -c avrisp2 -p m644p -qq -U lfuse:r:/tmp/LOW.tmp:h  -B 10
$ cat /tmp/LOW.tmp 
0x62