$ git clone -n https://src.fedoraproject.org/rpms/firecracker.git /var/lib/mock/f41-build-1020769-18018/root/chroot_tmpdir/scmroot/firecracker
Cloning into '/var/lib/mock/f41-build-1020769-18018/root/chroot_tmpdir/scmroot/firecracker'...
$ git fetch origin e23c2d32284b07ee1a3ff4c5a34911866e511020:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/firecracker
 * [new ref]         e23c2d32284b07ee1a3ff4c5a34911866e511020 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e23c2d3 Update vm-superio for the upstream vmm-sys-util CVE fix