$ git clone -n https://gitee.com/fundawang/git.git /var/lib/mock/dist-an23-build-286859-64835/root/chroot_tmpdir/scmroot/git
Cloning into '/var/lib/mock/dist-an23-build-286859-64835/root/chroot_tmpdir/scmroot/git'...
$ git fetch origin ac1f1c1e4c7c19fff6a683e9715b8aad75d8dc3c:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/git
 * [new ref]         ac1f1c1e4c7c19fff6a683e9715b8aad75d8dc3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac1f1c1 update