$ git clone -n https://src.fedoraproject.org/rpms/python-webtest.git /var/lib/mock/f41-build-side-2-python-2707256-30434/root/chroot_tmpdir/scmroot/python-webtest
Cloning into '/var/lib/mock/f41-build-side-2-python-2707256-30434/root/chroot_tmpdir/scmroot/python-webtest'...
$ git fetch origin 9b72a99d005c768ddbb8be0c13367cc90a423bb3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-webtest
 * [new ref]         9b72a99d005c768ddbb8be0c13367cc90a423bb3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b72a99 Update to upstream.