Merge pull request flux-framework#1295 from wihobbs/ver-clarity

cmake: clarify git-push suggestion

CMakeLists.txt

@@ -26,9 +26,10 @@ if (LENGTH_FLUX_SCHED_VER STREQUAL "0")
     "    2. If you are running in a CI environment, run `git fetch --tags`\n"
     "       before building. Versions in flux-sched are derived from \n"
     "       `git describe` which uses the most recent tag.\n"
-    "    3. If you are running in a fork of the main repository, try\n"
-    "       `git push --tags` to make sure tags are synchronized in \n"
-    "       your fork.\n"
+    "    3. If you are running remote CI in a fork of the main repository,\n"
+    "       try pushing the upstream tags to your fork with\n"
+    "       `git push --tags <your_remote>` to make sure tags are\n"
+    "       synchronized in your fork.\n"
     "    4. If you are running outside of a repo (such as in a buildfarm),\n"
     "       add a file to the source directory called flux-sched.ver and\n"
     "       place a valid version string in that file."