$ git clone -n https://src.fedoraproject.org/rpms/R-tesseract.git /var/lib/mock/f42-build-864549-172426/root/chroot_tmpdir/scmroot/R-tesseract
Cloning into '/var/lib/mock/f42-build-864549-172426/root/chroot_tmpdir/scmroot/R-tesseract'...
$ git fetch origin 8ffe2168269ad607c893d11074c8eca421323787:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-tesseract
 * [new ref]         8ffe2168269ad607c893d11074c8eca421323787 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ffe216 BR: tesseract-langpack-eng