$ git clone -n https://gitee.com/ocs-upgrade/sane-backends.git /var/lib/mock/dist-ocs23-base-build-297338-29027/root/chroot_tmpdir/scmroot/sane-backends
Cloning into '/var/lib/mock/dist-ocs23-base-build-297338-29027/root/chroot_tmpdir/scmroot/sane-backends'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/ocs-upgrade/sane-backends
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a7c0dc update sane-backends.spec.