$ git clone -n https://src.fedoraproject.org/rpms/mlton.git /var/lib/mock/f38-build-side-42-init-devel-677845-26695/root/chroot_tmpdir/scmroot/mlton
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-677845-26695/root/chroot_tmpdir/scmroot/mlton'...
$ git fetch origin 37d2d06840eb4a3dca4645484f90d8bf9fee2dbc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mlton
 * [new ref]         37d2d06840eb4a3dca4645484f90d8bf9fee2dbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 37d2d06 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild