$ git clone -n https://src.fedoraproject.org/rpms/python-pyasn1.git /var/lib/mock/f40-build-2135587-50815/root/chroot_tmpdir/scmroot/python-pyasn1
Cloning into '/var/lib/mock/f40-build-2135587-50815/root/chroot_tmpdir/scmroot/python-pyasn1'...
$ git fetch origin 090da184c81b76068482894f03808b21335ba5e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pyasn1
 * [new ref]         090da184c81b76068482894f03808b21335ba5e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 090da18 New upstream location