Looking at the "Process Viewer/Log", the "Log Selected..." (Ctrl+Shift+L) action appears to issue a git command like:

git log --format=... --decorate=full --date=iso -- <selected-path>

If the <selected-path> has been removed in a later revision on the current branch (not present in the HEAD revision) or is added just in a revision on a different branch, the Log shown turns out empty. The "Log Selected..." action should also specify the selected commit/revision on the git command line like:

git log --format=... --decorate=full --date=iso <selected-commit> -- <selected-path>

This will always show the history of the selected file leading (up) to the commit the file has been selected in, regardless of the current branch/HEAD.

• git-log <revision-range>
  • Specifying Ranges