$ git clone -n https://gitee.com/mgb01105731/deepin-reader.git /var/lib/mock/dist-an23-dde-build-378488-71802/root/chroot_tmpdir/scmroot/deepin-reader
Cloning into '/var/lib/mock/dist-an23-dde-build-378488-71802/root/chroot_tmpdir/scmroot/deepin-reader'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/deepin-reader
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52462dd get tar from source