BRBUILDLOG:command:br_prepare_repo binutils_gdb master ---> git checkout -f "master" fatal: Unable to create '/home/jbglaw/repos/binutils_gdb/.git/index.lock': File exists. If no other git process is currently running, this probably means a git process crashed in this repository earlier. Make sure no other git process is running and remove the file manually to continue. BRBUILDLOG:starttime:1510703797.830186479 BRBUILDLOG:stoptime:1510703797.853816175 BRBUILDLOG:duration:.023629696 BRBUILDLOG:status:1