$ git clone -n https://gitee.com/gcdota930915/gnutls_1_1.git /var/lib/mock/dist-an23-build-501500-74764/root/chroot_tmpdir/scmroot/gnutls_1_1
Cloning into '/var/lib/mock/dist-an23-build-501500-74764/root/chroot_tmpdir/scmroot/gnutls_1_1'...
$ git fetch origin 3a02b78533c62b6fe09270cfc60390cd5c6d8d0d:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/gnutls_1_1
 * [new ref]         3a02b78533c62b6fe09270cfc60390cd5c6d8d0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a02b78 update gnutls.spec.