$ git clone -n https://gitee.com/feng-weiyao/gtkmm30.git /var/lib/mock/dist-ocs23-build-33412-1524/root/chroot_tmpdir/scmroot/gtkmm30
Cloning into '/var/lib/mock/dist-ocs23-build-33412-1524/root/chroot_tmpdir/scmroot/gtkmm30'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/feng-weiyao/gtkmm30
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 25962ea OCS package init