$ git clone -n https://src.fedoraproject.org/rpms/python-tokenize-rt.git /var/lib/mock/f39-build-1426868-31613/root/chroot_tmpdir/scmroot/python-tokenize-rt
Cloning into '/var/lib/mock/f39-build-1426868-31613/root/chroot_tmpdir/scmroot/python-tokenize-rt'...
$ git fetch origin 1408b3560d294deae92244907215d7b80eb65edf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-tokenize-rt
 * [new ref]         1408b3560d294deae92244907215d7b80eb65edf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1408b35 Update to 5.2.0 (fedora#2227583)