$ git clone -n https://src.fedoraproject.org/rpms/fmit.git /var/lib/mock/f40-build-2278313-55264/root/chroot_tmpdir/scmroot/fmit
Cloning into '/var/lib/mock/f40-build-2278313-55264/root/chroot_tmpdir/scmroot/fmit'...
$ git fetch origin 3d43c3d34912c1b332fafd8a10f150c1868f6e5f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fmit
 * [new ref]         3d43c3d34912c1b332fafd8a10f150c1868f6e5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d43c3d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild