$ git clone -n https://src.fedoraproject.org/rpms/python-nltk.git /var/lib/mock/f45-build-31724-655/root/chroot_tmpdir/scmroot/python-nltk
Cloning into '/var/lib/mock/f45-build-31724-655/root/chroot_tmpdir/scmroot/python-nltk'...
$ git fetch origin c14bc4c3d32dc4ef054cda5ff328dd8da17a4649:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nltk
 * [new ref]         c14bc4c3d32dc4ef054cda5ff328dd8da17a4649 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c14bc4c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild