$ git clone -n https://src.fedoraproject.org/rpms/postgresql-ip4r.git /var/lib/mock/f40-build-2255884-54266/root/chroot_tmpdir/scmroot/postgresql-ip4r
Cloning into '/var/lib/mock/f40-build-2255884-54266/root/chroot_tmpdir/scmroot/postgresql-ip4r'...
$ git fetch origin 0a460d0ea058853e16a8b44e04a80f87cfc6d9ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/postgresql-ip4r
 * [new ref]         0a460d0ea058853e16a8b44e04a80f87cfc6d9ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a460d0 Add LLVM check using postgresql_server_llvmjit macro