$ git clone -n https://src.fedoraproject.org/rpms/sayonara.git /var/lib/mock/f39-build-1495547-34544/root/chroot_tmpdir/scmroot/sayonara
Cloning into '/var/lib/mock/f39-build-1495547-34544/root/chroot_tmpdir/scmroot/sayonara'...
$ git fetch origin c38c72a8c412f21c08c9e08f942cb650a7f7dde4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sayonara
 * [new ref]         c38c72a8c412f21c08c9e08f942cb650a7f7dde4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c38c72a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild