See:
https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/7OT3WTW7TITCNGYLAOYHRQNLCKPUDEAV/
let fedora-branch = "rawhide"
#let fedora-branch = "f34"
-let fedora-tag = "f37-build-side-54560"
+let fedora-tag = "f38-build-side-62208"
# The magic string that must appear in %changelog when the
# package has been rebuilt.
-let fedora-rebuild-name = "OCaml 4.14.0 rebuild"
+let fedora-rebuild-name = "Rebuild OCaml packages for F38"
# Packages that are ignored, which means they are treated as if
# they have been rebuilt.