In CDRIVER-3496 a change to the file ./.evergreen/spec.patch was needed to skip building against libmongocrypt in the build_snapshot_rpm.sh. Without the patch, the task was failing to find the dependent libmongocrypt package with an error like:

No matching package to install: 'cmake(mongocrypt)'

Example failing patch build.

The Fedora package page for libmongocrypt indicates the package is available for Fedora 30+. build_snapshot_rpm.sh, on this line builds a chroot environment with Fedora 29. But naively changing it to Fedora 30 resulted in the same failure for me testing with a spawn host.