$ git clone -n https://gitee.com/src-opencloudos-rpms/mailcap.git /var/lib/mock/dist-oc9-build-128995-77603/root/chroot_tmpdir/scmroot/mailcap
Cloning into '/var/lib/mock/dist-oc9-build-128995-77603/root/chroot_tmpdir/scmroot/mailcap'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/mailcap
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ecb30b5 import mailcap-2.1.54-4.tl4