$ git clone -n https://src.fedoraproject.org/rpms/sympy.git /var/lib/mock/f41-build-side-1-3136289-39772/root/chroot_tmpdir/scmroot/sympy
Cloning into '/var/lib/mock/f41-build-side-1-3136289-39772/root/chroot_tmpdir/scmroot/sympy'...
$ git fetch origin 8dbb3d5d1cd769752b5c9fc00fea34a8b7308c60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sympy
 * [new ref]         8dbb3d5d1cd769752b5c9fc00fea34a8b7308c60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8dbb3d5 Version 1.13.3