$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Serializer.git /var/lib/mock/f39-build-1453143-32872/root/chroot_tmpdir/scmroot/perl-Data-Serializer
Cloning into '/var/lib/mock/f39-build-1453143-32872/root/chroot_tmpdir/scmroot/perl-Data-Serializer'...
$ git fetch origin 9e48e627f52e912fa48fb7e09ae7cdd8788d91c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Serializer
 * [new ref]         9e48e627f52e912fa48fb7e09ae7cdd8788d91c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e48e62 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild