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:1518574282.904046843 BRBUILDLOG:stoptime:1518574282.922910181 BRBUILDLOG:duration:.018863338 BRBUILDLOG:status:1