$ git clone -n https://src.fedoraproject.org/rpms/tesseract.git /var/lib/mock/f42-build-864542-172417/root/chroot_tmpdir/scmroot/tesseract
Cloning into '/var/lib/mock/f42-build-864542-172417/root/chroot_tmpdir/scmroot/tesseract'...
$ git fetch origin 248884085eec941b2de52e558924853477281a80:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tesseract
 * [new ref]         248884085eec941b2de52e558924853477281a80 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2488840 Rebuild (mingw-icu)