$ git clone -n https://gitee.com/opencloudos-stream/ffmpegthumbs.git /var/lib/mock/dist-oc9-epol-build-101492-65836/root/chroot_tmpdir/scmroot/ffmpegthumbs
Cloning into '/var/lib/mock/dist-oc9-epol-build-101492-65836/root/chroot_tmpdir/scmroot/ffmpegthumbs'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ffmpegthumbs
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2f66ad update