$ git clone -n https://src.fedoraproject.org/rpms/kernel.git /var/lib/mock/f43-build-side-114713-60960092-6586783/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/f43-build-side-114713-60960092-6586783/root/chroot_tmpdir/scmroot/kernel'...
$ git fetch origin 411be5b51a7c127fcce05175f0683e92e9fa624a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kernel
 * [new ref]             411be5b51a7c127fcce05175f0683e92e9fa624a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 411be5b51 Bump for perl build