$ git clone -n https://src.fedoraproject.org/rpms/fractal.git /var/lib/mock/f45-build-9210-400/root/chroot_tmpdir/scmroot/fractal
Cloning into '/var/lib/mock/f45-build-9210-400/root/chroot_tmpdir/scmroot/fractal'...
$ git fetch origin 462dc79bb7b6e8818af93a9fc698632691b2eca7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fractal
 * [new ref]         462dc79bb7b6e8818af93a9fc698632691b2eca7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 462dc79 14.1