$ git clone -n https://gitee.com/src-opencloudos-rpms/libtasn1.git /var/lib/mock/dist-oc9-build-47010-14592/root/chroot_tmpdir/scmroot/libtasn1
Cloning into '/var/lib/mock/dist-oc9-build-47010-14592/root/chroot_tmpdir/scmroot/libtasn1'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libtasn1
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b9d0d4 import libtasn1-4.18.0-3.tl4