$ git clone -n https://gitee.com/wenyuzifang/tar.git /var/lib/mock/dist-an23-build-464340-73881/root/chroot_tmpdir/scmroot/tar
Cloning into '/var/lib/mock/dist-an23-build-464340-73881/root/chroot_tmpdir/scmroot/tar'...
$ git fetch origin a758649959ea9a2416d3e7f3998807b3606e4032:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tar
 * [new ref]         a758649959ea9a2416d3e7f3998807b3606e4032 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a758649 Update code from upstream