$ git clone -n https://gitee.com/src-opencloudos-rpms/exiv2.git /var/lib/mock/dist-oc9-build-62933-16463/root/chroot_tmpdir/scmroot/exiv2
Cloning into '/var/lib/mock/dist-oc9-build-62933-16463/root/chroot_tmpdir/scmroot/exiv2'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/exiv2
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c745bd4 import exiv2-0.27.5-4.tl4