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:1510402621.389937422 BRBUILDLOG:stoptime:1510402621.408828209 BRBUILDLOG:duration:.018890787 BRBUILDLOG:status:1