avrdude -pm128 -Ulfuse:w:0xff:m -Uhfuse:w:0xC9:m -Uefuse:w:0xff:m -Uflash:w:main.hex

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9702
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
         To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: reading input file "0xff"
avrdude: writing lfuse (1 bytes):

Writing | ################################################## | 100% 0.01s

avrdude: 1 bytes of lfuse written
avrdude: verifying lfuse memory against 0xff:
avrdude: load data lfuse data from input file 0xff:
avrdude: input file 0xff contains 1 bytes
avrdude: reading on-chip lfuse data:

Reading | ################################################## | 100% 0.00s

avrdude: verifying ...
avrdude: 1 bytes of lfuse verified
avrdude: reading input file "0xC9"
avrdude: writing hfuse (1 bytes):

Writing |                                                    | 0% 0.00s ***failed;
Writing | ################################################## | 100% 0.06s

avrdude: 1 bytes of hfuse written
avrdude: verifying hfuse memory against 0xC9:
avrdude: load data hfuse data from input file 0xC9:
avrdude: input file 0xC9 contains 1 bytes
avrdude: reading on-chip hfuse data:

Reading | ################################################## | 100% 0.00s

avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0000
         0xc9 != 0x99
avrdude: verification error; content mismatch

avrdude: safemode: hfuse changed! Was c9, and is now 99
Would you like this fuse to be changed back? [y/n] y
avrdude: safemode: and is now rescued
avrdude: safemode: Fuses OK

avrdude done.  Thank you.