$ git clone -n https://gitee.com/src-opencloudos-rpms/samba.git /var/lib/mock/dist-oc9-build-246461-83475/root/chroot_tmpdir/scmroot/samba
Cloning into '/var/lib/mock/dist-oc9-build-246461-83475/root/chroot_tmpdir/scmroot/samba'...
$ git fetch origin 21d051d184295f0210325bd86b01d7beb5da37b2:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/samba
 * [new ref]         21d051d184295f0210325bd86b01d7beb5da37b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21d051d import samba-4.19.4-12.tl4