arduino uno smd r2: avrdude: stk500_getsync(): not in sync: resp=0x00

Ouch, it is not pulling the reset on the target board. It should look like this:

Atmega chip programmer.
Written by Nick Gammon.
Entered programming mode OK.
Signature = 0x1E 0x95 0x0F 
Processor = ATmega328P
Flash memory size = 32768 bytes.
LFuse = 0xFF 
HFuse = 0xDE 
EFuse = 0xFD 
Lock byte = 0xCF 
Bootloader address = 0x7E00
Bootloader length = 512 bytes.
Type 'L' to use Lilypad (8 MHz) loader, or 'U' for Uno (16 MHz) loader ...

Check and/or replace the jumper from D10 of the Programmer going to the Reset of the Target Uno. Do you have Female jumpers?