If, when running jenv doctor, you see

[ERROR]	Java binary in path is not in the jenv shims.
[ERROR]	Please check your path, or try using /path/to/java/home is not a valid path to java installation.

make sure export JENV_ROOT=/usr/local/opt/jenv appears before if which jenv > /dev/null; then eval "$(jenv init -)"; fi in .bash_profile.

This is related to symlinks the next issue.

1. Start by enabling symlinks issue below.
2. After symlinks has been enabled. In Git Bash navigate to jenv location. Default is ~/.jenv
3. Enable symlinks for the repository git config core.symlinks true
4. Do a new checkout of bin/jenv run git checkout -- bin/jenv
   Your problems should be solved.

It seems that it becomes a full copy instead of a symlink ~/.jenv/versions should have a size of 0, but without symlinks this grows fast since each alias is a full copy of the JVM.

1. You need to run Git Bash as administrator (can be configure to always run as administrator under Properties -> Compatibility, make sure you know what this means).
2. In Git Bash run export MSYS=winsymlinks:nativestrict this could be added to ~/.bash_profile