$ git clone -n https://src.fedoraproject.org/rpms/sympy.git /var/lib/mock/f42-build-3531145-46321/root/chroot_tmpdir/scmroot/sympy
Cloning into '/var/lib/mock/f42-build-3531145-46321/root/chroot_tmpdir/scmroot/sympy'...
$ git fetch origin 9980a85e87cdf56ec606c69d101b06d8f055e66f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sympy
 * [new ref]         9980a85e87cdf56ec606c69d101b06d8f055e66f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9980a85 Version 1.14.0