$ git clone -n https://src.fedoraproject.org/rpms/flopgen.git /var/lib/mock/f40-build-2285615-55683/root/chroot_tmpdir/scmroot/flopgen
Cloning into '/var/lib/mock/f40-build-2285615-55683/root/chroot_tmpdir/scmroot/flopgen'...
$ git fetch origin 61878b7c44e92c2b2baa27cec3f22d2b6a484901:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flopgen
 * [new ref]         61878b7c44e92c2b2baa27cec3f22d2b6a484901 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61878b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild