$ git clone -n https://gitee.com/gcdota930915/gnutls.git /var/lib/mock/dist-an23-build-518003-75360/root/chroot_tmpdir/scmroot/gnutls
Cloning into '/var/lib/mock/dist-an23-build-518003-75360/root/chroot_tmpdir/scmroot/gnutls'...
$ git fetch origin 2b75cd0b99d23fd302888740ac362c42ac6cc96b:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/gnutls
 * [new ref]         2b75cd0b99d23fd302888740ac362c42ac6cc96b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b75cd0 update gnutls.spec.