$ git clone -n https://src.fedoraproject.org/rpms/yamllint.git /var/lib/mock/f40-build-2164449-50972/root/chroot_tmpdir/scmroot/yamllint
Cloning into '/var/lib/mock/f40-build-2164449-50972/root/chroot_tmpdir/scmroot/yamllint'...
$ git fetch origin 758df33e1c5876715f27bc9a31bf24a4848ae72a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yamllint
 * [new ref]         758df33e1c5876715f27bc9a31bf24a4848ae72a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 758df33 Update to latest upstream version