$ git clone -n https://src.fedoraproject.org/rpms/xfce4-docklike-plugin.git /var/lib/mock/f42-build-3406893-45143/root/chroot_tmpdir/scmroot/xfce4-docklike-plugin
Cloning into '/var/lib/mock/f42-build-3406893-45143/root/chroot_tmpdir/scmroot/xfce4-docklike-plugin'...
$ git fetch origin da799853e291f0248afa10154c7d8e7ffdb9b9b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-docklike-plugin
 * [new ref]         da799853e291f0248afa10154c7d8e7ffdb9b9b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da79985 Update to 0.4.3