fix(graph): Ensure local master moves to upstream

[epage]

Repeatedly, the local master doesn't get moved. This seems to fix it.

• We weren't checking for branches on the starting commit and sometimes we start on the new master
• When on a branch commit, we weren't correctly walking children because we were talking about "primary" when there isn't always a primary commit

I'm a bit unsure on that last one. Hope this doesn't break more

[coveralls]

Pull Request Test Coverage Report for Build 12098640664

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 16 of 17 (94.12%) changed or added relevant lines in 2 files are covered.
• 5 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.06%) to 29.333%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/graph/ops.rs	15	16	93.75%

Files with Coverage Reduction	New Missed Lines	%
src/legacy/git/repo.rs	1	45.84%
src/legacy/git/commands.rs	1	58.75%
src/git/repo.rs	1	44.48%
src/rewrite/mod.rs	2	47.55%

Totals
Change from base Build 11630847827:	-0.06%
Covered Lines:	1640
Relevant Lines:	5591

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💛 - Coveralls