$ git clone -n https://src.fedoraproject.org/rpms/pcb.git /var/lib/mock/f39-build-1647388-40435/root/chroot_tmpdir/scmroot/pcb
Cloning into '/var/lib/mock/f39-build-1647388-40435/root/chroot_tmpdir/scmroot/pcb'...
$ git fetch origin 1cfe0a6c8f13df2dd79ebcf914c173ef4f7d7df8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pcb
 * [new ref]         1cfe0a6c8f13df2dd79ebcf914c173ef4f7d7df8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1cfe0a6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild