$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Dumpvar.git /var/lib/mock/f40-build-2016775-46232/root/chroot_tmpdir/scmroot/perl-Devel-Dumpvar
Cloning into '/var/lib/mock/f40-build-2016775-46232/root/chroot_tmpdir/scmroot/perl-Devel-Dumpvar'...
$ git fetch origin b252319de51a19f4bc0da04cb62ab56bde058c12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Dumpvar
 * [new ref]         b252319de51a19f4bc0da04cb62ab56bde058c12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b252319 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild