$ git clone -n https://src.fedoraproject.org/rpms/perl-Sereal-Encoder.git /var/lib/mock/f40-build-778722-130078/root/chroot_tmpdir/scmroot/perl-Sereal-Encoder
Cloning into '/var/lib/mock/f40-build-778722-130078/root/chroot_tmpdir/scmroot/perl-Sereal-Encoder'...
$ git fetch origin 509478eab2210e0a6d46b5c4df481ca1470052f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sereal-Encoder
 * [new ref]         509478eab2210e0a6d46b5c4df481ca1470052f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 509478e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild