$ git clone -n https://src.fedoraproject.org/rpms/fpc.git /var/lib/mock/f39-build-2471159-61453/root/chroot_tmpdir/scmroot/fpc
Cloning into '/var/lib/mock/f39-build-2471159-61453/root/chroot_tmpdir/scmroot/fpc'...
$ git fetch origin aa64f54a92d06d6077ef7b0bf0bba76986a74997:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fpc
 * [new ref]         aa64f54a92d06d6077ef7b0bf0bba76986a74997 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa64f54 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild