$ git clone -n https://src.fedoraproject.org/rpms/mingw-expat.git /var/lib/mock/f45-build-18418-515/root/chroot_tmpdir/scmroot/mingw-expat
Cloning into '/var/lib/mock/f45-build-18418-515/root/chroot_tmpdir/scmroot/mingw-expat'...
$ git fetch origin be965570572b0a5b6bec62e7d2f84ec964894cc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-expat
 * [new ref]         be965570572b0a5b6bec62e7d2f84ec964894cc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be96557 Update to 2.8.3