https://gitlab.com/gitlab-org/gitaly/-/merge_requests/3537 updated the
default branch to be `master` instead of `main`. This broke
`backfill_snippet_repositories_spec.rb` because it expected to create
commits in `master`, but the default branch was `main`.

Since `main` is now the default, we should target the initial commit for
that branch.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/336538

Allow updating merged results pipelines and merge trains via API [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!56237

Move API CI related classes under Ci namespace

See merge request gitlab-org/gitlab!66263

Add SAML provider search to UsersFinder

See merge request gitlab-org/gitlab!66162

Remove helm doc warnings

See merge request gitlab-org/gitlab!66484

Add details about project feature settings

See merge request gitlab-org/gitlab!54276

Update GitLab Runner Helm Chart to 0.31.0/14.1.0

See merge request gitlab-org/gitlab!66447

Fix line numbers not being calculated properly

See merge request gitlab-org/gitlab!66475

Add project-level VSA for deploy metrics

See merge request gitlab-org/gitlab!65378

Resolve "Evaluate master/main usage and resolve issues - Package"

See merge request gitlab-org/gitlab!66469

Document wiki default branch behavior

See merge request gitlab-org/gitlab!66404

Remove marketing email opt-in for self-managed

See merge request gitlab-org/gitlab!66255

Clean up data-testid and use findByRole

See merge request gitlab-org/gitlab!66379

Add a note about sub group data

See merge request gitlab-org/gitlab!65365

nginx: modernise TLS config

See merge request gitlab-org/gitlab!65345

Cloud Licensing Updates to Docs

See merge request gitlab-org/gitlab!61314

Create branch from Jira issue MVC 2: add new_branch_form Vue App

See merge request gitlab-org/gitlab!66036

Use findByRole to improve bundle
size and accessbility.

Self-managed instances do not need to have an explicit
opt-in for in product marketing emails on self-managed.

This is because the data is never shared outside of the
instance, the admin can control the emails, and users
can opt-out of the notifications.

Changelog: removed

Add more properties to the Secure scan snowplow tracking event

See merge request gitlab-org/gitlab!66303

Add ability to view blobs accross branches

See merge request gitlab-org/gitlab!66156

Clean up Datadog page for CTRT

See merge request gitlab-org/gitlab!65083

Update iteration title when dates change

See merge request gitlab-org/gitlab!64988

Update Gitaly version

See merge request gitlab-org/gitlab!66456

Add custom fallback to GenericMetric

See merge request gitlab-org/gitlab!66436

Look up SSH keys by SHA256 fingerprint, not MD5 fingerprint

See merge request gitlab-org/gitlab!66371

Track execution of project overwrite service

See merge request gitlab-org/gitlab!66372

Fix: Sidekiq workers delete each other's metrics

See merge request gitlab-org/gitlab!66432

Revise UI text for Kroki settings

See merge request gitlab-org/gitlab!66258

Add Chrome to Jira connect working browsers

See merge request gitlab-org/gitlab!66236