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:1507835688.116502312 BRBUILDLOG:stoptime:1507835688.135404200 BRBUILDLOG:duration:.018901888 BRBUILDLOG:status:1