$ git clone -n https://gitee.com/gcdota930915/gnutls_1_1.git /var/lib/mock/dist-an23-build-501468-74764/root/chroot_tmpdir/scmroot/gnutls_1_1
Cloning into '/var/lib/mock/dist-an23-build-501468-74764/root/chroot_tmpdir/scmroot/gnutls_1_1'...
$ git fetch origin f6bab7d772e04e0ae0bd4c97e3fb088154cc0e50:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/gnutls_1_1
 * [new ref]         f6bab7d772e04e0ae0bd4c97e3fb088154cc0e50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6bab7d update gnutls.spec.