$ git clone -n https://gitee.com/fundawang/tar.git /var/lib/mock/dist-an23-build-288685-64871/root/chroot_tmpdir/scmroot/tar
Cloning into '/var/lib/mock/dist-an23-build-288685-64871/root/chroot_tmpdir/scmroot/tar'...
$ git fetch origin 8e9b2d96e888495eefbd672afb6ccaf86080cd4a:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/tar
 * [new ref]         8e9b2d96e888495eefbd672afb6ccaf86080cd4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e9b2d9 fix