$ git clone -n https://src.fedoraproject.org/rpms/mlton.git /var/lib/mock/f40-build-2673776-67649/root/chroot_tmpdir/scmroot/mlton
Cloning into '/var/lib/mock/f40-build-2673776-67649/root/chroot_tmpdir/scmroot/mlton'...
$ git fetch origin 52230601f39d8ad5f0cd0732dbf16c1ffc5c6bc3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mlton
 * [new ref]         52230601f39d8ad5f0cd0732dbf16c1ffc5c6bc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5223060 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild