$ git clone -n https://src.fedoraproject.org/rpms/golang-github-sacloud-http.git /var/lib/mock/f40-build-2002080-44669/root/chroot_tmpdir/scmroot/golang-github-sacloud-http
Cloning into '/var/lib/mock/f40-build-2002080-44669/root/chroot_tmpdir/scmroot/golang-github-sacloud-http'...
$ git fetch origin 2f9dfb8713dbb493e27c31cd4b4613233b7f573a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-sacloud-http
 * [new ref]         2f9dfb8713dbb493e27c31cd4b4613233b7f573a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f9dfb8 Initial import