$ git clone -n https://src.fedoraproject.org/rpms/compiler-rt.git /var/lib/mock/f37-build-642763-72068/root/chroot_tmpdir/scmroot/compiler-rt
Cloning into '/var/lib/mock/f37-build-642763-72068/root/chroot_tmpdir/scmroot/compiler-rt'...
$ git reset --hard 7b99b8cb28d642bb122a891c295578c8a7e924c7
HEAD is now at 7b99b8c Make sure asm files are built with -fcf-protection