$ git clone -n https://gitee.com/opencloudos-stream/kdiff3.git /var/lib/mock/dist-oc9-epol-build-92387-59313/root/chroot_tmpdir/scmroot/kdiff3
Cloning into '/var/lib/mock/dist-oc9-epol-build-92387-59313/root/chroot_tmpdir/scmroot/kdiff3'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/kdiff3
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a2e03c package init