$ git clone -n https://src.fedoraproject.org/rpms/perl-Sereal-Encoder.git /var/lib/mock/f39-build-1543181-36540/root/chroot_tmpdir/scmroot/perl-Sereal-Encoder
Cloning into '/var/lib/mock/f39-build-1543181-36540/root/chroot_tmpdir/scmroot/perl-Sereal-Encoder'...
$ git fetch origin 18d3fde867686ece34bb93eb7fc0b8573cba8e72:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sereal-Encoder
 * [new ref]         18d3fde867686ece34bb93eb7fc0b8573cba8e72 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18d3fde Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild