Autoconf 2.72 seems to be under preparation upstream, I therefore started to build dependent components to verify that they can be built once it lands in Fedora.

Your component fails to build with the new version of autoconf, due to the following error:

---
checking for GTK... yes
Using config source xml:merged:/etc/gconf/gconf.xml.defaults for schema installation
Using $(sysconfdir)/gconf/schemas as install directory for schema files
checking for CAIRO... yes
./configure: line 30733: syntax error near unexpected token `fi'
./configure: line 30733: `fi'
error: Bad exit status from /var/tmp/rpm-tmp.KDCW4H (%build)
    Bad exit status from /var/tmp/rpm-tmp.KDCW4H (%build)
RPM build errors:
Child return code was: 1
---

The error is due to a misplace 'fi' in acinclude.m4.

The proposed patch is the following:
---
diff -r -U5 Celestia-1.6.2-beta3.old/acinclude.m4 Celestia-1.6.2-beta3/acinclude.m4
--- Celestia-1.6.2-beta3.old/acinclude.m4	2022-11-22 09:54:34.759349238 +0100
+++ Celestia-1.6.2-beta3/acinclude.m4	2022-11-22 09:54:43.836371600 +0100
@@ -2628,12 +2628,12 @@
             eval "kde_cv_qt_jpeg=no",
             eval "kde_cv_qt_jpeg=yes")
 LIBS="$ac_save_LIBS"
 CXXFLAGS="$ac_save_CXXFLAGS"
 AC_LANG_RESTORE
-fi
 ])
+fi
 
 if eval "test ! \"`echo $kde_cv_qt_jpeg`\" = no"; then
   AC_MSG_RESULT(yes)
   LIBJPEG_QT='$(LIBJPEG)'
 else
---

Please have a look and get it fixed upstream.