$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Devel-StackTrace.git /var/lib/mock/dist-oc9-build-43546-14591/root/chroot_tmpdir/scmroot/perl-Devel-StackTrace
Cloning into '/var/lib/mock/dist-oc9-build-43546-14591/root/chroot_tmpdir/scmroot/perl-Devel-StackTrace'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Devel-StackTrace
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc62b07 import perl-Devel-StackTrace-2.04-3.tl4