$ git clone -n https://gitee.com/gcdota930915/gnutls_1_1.git /var/lib/mock/dist-an23-build-501470-74764/root/chroot_tmpdir/scmroot/gnutls_1_1
Cloning into '/var/lib/mock/dist-an23-build-501470-74764/root/chroot_tmpdir/scmroot/gnutls_1_1'...
$ git fetch origin ff783c055777e321554b1ddfddf656d8a6a92378:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/gnutls_1_1
 * [new ref]         ff783c055777e321554b1ddfddf656d8a6a92378 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff783c0 update gnutls.spec.