$ git clone -n https://src.fedoraproject.org/rpms/llvm-bolt.git /var/lib/mock/f41-build-side-1-2959912-35691/root/chroot_tmpdir/scmroot/llvm-bolt
Cloning into '/var/lib/mock/f41-build-side-1-2959912-35691/root/chroot_tmpdir/scmroot/llvm-bolt'...
$ git fetch origin d27ec71c29b4415033e46088bc9c143703383cf6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm-bolt
 * [new ref]         d27ec71c29b4415033e46088bc9c143703383cf6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d27ec71 Update to 19.1.0