$ git clone -n https://src.fedoraproject.org/rpms/python-pytest-arraydiff.git /var/lib/mock/f40-build-2223175-52728/root/chroot_tmpdir/scmroot/python-pytest-arraydiff
Cloning into '/var/lib/mock/f40-build-2223175-52728/root/chroot_tmpdir/scmroot/python-pytest-arraydiff'...
$ git fetch origin 3fac13358546c7f2d62dc720fa7b95b21272407c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pytest-arraydiff
 * [new ref]         3fac13358546c7f2d62dc720fa7b95b21272407c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3fac133 Exclude i686 arch (pytables is missing there)