6 files declare their use of Git

DiagnoseCommand.php in vendor/composer/composer/src/Composer/Command/DiagnoseCommand.php
GitDownloader.php in vendor/composer/composer/src/Composer/Downloader/GitDownloader.php
GitDriver.php in vendor/composer/composer/src/Composer/Repository/Vcs/GitDriver.php
Locker.php in vendor/composer/composer/src/Composer/Package/Locker.php
PathRepository.php in vendor/composer/composer/src/Composer/Repository/PathRepository.php
VersionGuesser.php in vendor/composer/composer/src/Composer/Package/Version/VersionGuesser.php