$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Bit-Vector.git /var/lib/mock/dist-oc9-build-71045-47506/root/chroot_tmpdir/scmroot/perl-Bit-Vector
Cloning into '/var/lib/mock/dist-oc9-build-71045-47506/root/chroot_tmpdir/scmroot/perl-Bit-Vector'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Bit-Vector
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cb6a75 import perl-Bit-Vector-7.4-5.tl4