$ git clone -n https://gitee.com/opencloudos-stream/g2clib.git /var/lib/mock/dist-oc9-epol-build-90873-59125/root/chroot_tmpdir/scmroot/g2clib
Cloning into '/var/lib/mock/dist-oc9-epol-build-90873-59125/root/chroot_tmpdir/scmroot/g2clib'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/g2clib
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0924f9 package init