$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-Vec.git /var/lib/mock/f40-build-2305953-57121/root/chroot_tmpdir/scmroot/perl-Math-Vec
Cloning into '/var/lib/mock/f40-build-2305953-57121/root/chroot_tmpdir/scmroot/perl-Math-Vec'...
$ git fetch origin 4343419ed09d20d4117915eef51a5718702c9d3b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Math-Vec
 * [new ref]         4343419ed09d20d4117915eef51a5718702c9d3b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4343419 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild