git log is called for artificial commits

[gerhardol]

Do you want to request a feature or report a bug?
bug

What is the current behavior?
GE tries to get information for artificial commits
This uses resources and is confusing in the log but has no other known side effects

This is a regression from #4275

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem.
Select an artificial commit
"C:\Program Files\Git\bin\git.exe" branch --contains 1111111111111111111111111111111111111111

What is the expected behavior?
To avoid calling these commands for artificial since they are meaningless.

Environment you encounter the issue:

• GitExtensions version: master

Did this work in previous version of GitExtensions (which)?
2.50.02

[gerhardol]

This can be pruned in ReloadCommitInfo() or for each individual command like GetAllBranchesWhichContainGivenCommit().
Using the first option in a PR.