$ git clone -n https://src.fedoraproject.org/rpms/golang-vitess.git /var/lib/mock/f40-build-2263164-54524/root/chroot_tmpdir/scmroot/golang-vitess
Cloning into '/var/lib/mock/f40-build-2263164-54524/root/chroot_tmpdir/scmroot/golang-vitess'...
$ git fetch origin 6aed6d1c2a5be7f3fb09b3cdda28966e3c4c975f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-vitess
 * [new ref]         6aed6d1c2a5be7f3fb09b3cdda28966e3c4c975f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6aed6d1 Remove deprecated %patchN syntax