$ git clone -n https://gitee.com/opencloudos-stream/pngcheck.git /var/lib/mock/dist-oc9-epol-build-77698-52845/root/chroot_tmpdir/scmroot/pngcheck
Cloning into '/var/lib/mock/dist-oc9-epol-build-77698-52845/root/chroot_tmpdir/scmroot/pngcheck'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/pngcheck
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9a3020 package init