Thanks for suggestion.
However, it's still not fetching the latest master branch with --head option.
Starting package 10/10: tesseract:x86-windows-static
Building package tesseract[core]:x86-windows-static from HEAD...
Warning: abi keys are missing values:
-- Package does not specify HEAD_REF. Falling back to non-HEAD version.
-- Extracting source C:/Joo/vcpkg/downloads/tesseract-ocr-tesseract-4.1.0.tar.gz
-- Applying patch fix-tiff-linkage.patch
-- Applying patch fix-text2image.patch
-- Using source at C:/Joo/vcpkg/buildtrees/tesseract/src/4.1.0-adb63d30fa
-- Configuring x86-windows-static
-- Building x86-windows-static-dbg
-- Building x86-windows-static-rel
-- Performing post-build validation
-- Performing post-build validation done
Building package tesseract[core]:x86-windows-static... done
Installing package tesseract[core]:x86-windows-static...
Installing package tesseract[core]:x86-windows-static... done
I ended up tweaking some cmake files to get it to work.