$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-MAT-Dumper.git /var/lib/mock/f40-build-2016806-46237/root/chroot_tmpdir/scmroot/perl-Devel-MAT-Dumper
Cloning into '/var/lib/mock/f40-build-2016806-46237/root/chroot_tmpdir/scmroot/perl-Devel-MAT-Dumper'...
$ git fetch origin 2642ab5051bdbba96b93470735b3d12a4cdf50e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-MAT-Dumper
 * [new ref]         2642ab5051bdbba96b93470735b3d12a4cdf50e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2642ab5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild