$ git clone -n https://gitee.com/gcdota930915/gnutls.git /var/lib/mock/dist-an23-build-518016-75360/root/chroot_tmpdir/scmroot/gnutls
Cloning into '/var/lib/mock/dist-an23-build-518016-75360/root/chroot_tmpdir/scmroot/gnutls'...
$ git fetch origin a3c9c3a237fdca57c31a569e2f1b7b225be9295d:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/gnutls
 * [new ref]         a3c9c3a237fdca57c31a569e2f1b7b225be9295d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3c9c3a update gnutls.spec.