$ git clone -n https://gitee.com/gcdota930915/gnutls.git /var/lib/mock/dist-an23-build-517972-75360/root/chroot_tmpdir/scmroot/gnutls
Cloning into '/var/lib/mock/dist-an23-build-517972-75360/root/chroot_tmpdir/scmroot/gnutls'...
$ git fetch origin c8421d637a4af82ad34900fe446ec05b1d8abb4b:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/gnutls
 * [new ref]         c8421d637a4af82ad34900fe446ec05b1d8abb4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8421d6 update gnutls.spec.