$ git clone -n https://src.fedoraproject.org/rpms/perl-File-Flat.git /var/lib/mock/f40-build-2017336-46301/root/chroot_tmpdir/scmroot/perl-File-Flat
Cloning into '/var/lib/mock/f40-build-2017336-46301/root/chroot_tmpdir/scmroot/perl-File-Flat'...
$ git fetch origin 3af2af2d42de30159c95a92ab53561214574e39b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-File-Flat
 * [new ref]         3af2af2d42de30159c95a92ab53561214574e39b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3af2af2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild