$ git clone -n https://gitee.com/opencloudos-stream/txt2man.git /var/lib/mock/dist-oc9-epol-build-84825-57395/root/chroot_tmpdir/scmroot/txt2man
Cloning into '/var/lib/mock/dist-oc9-epol-build-84825-57395/root/chroot_tmpdir/scmroot/txt2man'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/txt2man
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bbbef40 package init