$ git clone -n https://src.fedoraproject.org/rpms/mingw-antlr.git /var/lib/mock/f41-build-1022363-18070/root/chroot_tmpdir/scmroot/mingw-antlr
Cloning into '/var/lib/mock/f41-build-1022363-18070/root/chroot_tmpdir/scmroot/mingw-antlr'...
$ git fetch origin 67af951c12c5de9c6adcc4c53d7ae3baa54d2de7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-antlr
 * [new ref]         67af951c12c5de9c6adcc4c53d7ae3baa54d2de7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67af951 Eliminate use of obsolete %patchN syntax (#2283636)