$ git clone -n https://src.fedoraproject.org/rpms/deepin-dock.git /var/lib/mock/f39-build-1983631-43346/root/chroot_tmpdir/scmroot/deepin-dock
Cloning into '/var/lib/mock/f39-build-1983631-43346/root/chroot_tmpdir/scmroot/deepin-dock'...
$ git fetch origin 5714974b96c10237beec1cf298b2996e1ee1bf6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/deepin-dock
 * [new ref]         5714974b96c10237beec1cf298b2996e1ee1bf6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5714974 New release 5.5.81