$ git clone -n https://src.fedoraproject.org/rpms/python-elephant.git /var/lib/mock/f42-build-side-1-3566323-46733/root/chroot_tmpdir/scmroot/python-elephant
Cloning into '/var/lib/mock/f42-build-side-1-3566323-46733/root/chroot_tmpdir/scmroot/python-elephant'...
$ git fetch origin 250f18f72a68675f84ebb86f00f7881a0d115988:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-elephant
 * [new ref]         250f18f72a68675f84ebb86f00f7881a0d115988 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 250f18f Drop dependency on nixio