$ git clone -n https://src.fedoraproject.org/rpms/freefem++.git /var/lib/mock/f39-build-1723282-41230/root/chroot_tmpdir/scmroot/freefem++
Cloning into '/var/lib/mock/f39-build-1723282-41230/root/chroot_tmpdir/scmroot/freefem++'...
$ git fetch origin 821f451a573e1f9d1b5c6424aeb2036164f929b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freefem++
 * [new ref]         821f451a573e1f9d1b5c6424aeb2036164f929b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 821f451 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild