Check if ancestor branch is contained by other branches in remote

[abhay-krishna]

Check if ancestor branch is contained by other branches in remote.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4583834) 73.48% compared to head (d79939f) 73.54%.
Report is 102 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7626      +/-   ##
==========================================
+ Coverage   73.48%   73.54%   +0.05%     
==========================================
  Files         579      588       +9     
  Lines       36357    37178     +821     
==========================================
+ Hits        26718    27342     +624     
- Misses       7875     8038     +163     
- Partials     1764     1798      +34     

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[abhay-krishna]

Closing in favor of #7632.