$ git clone -n https://src.fedoraproject.org/rpms/python-referencing.git /var/lib/mock/f39-build-1732036-41251/root/chroot_tmpdir/scmroot/python-referencing
Cloning into '/var/lib/mock/f39-build-1732036-41251/root/chroot_tmpdir/scmroot/python-referencing'...
$ git fetch origin 6e3caffaaed9717d18a33e048d8f6939c963ae1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-referencing
 * [new ref]         6e3caffaaed9717d18a33e048d8f6939c963ae1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e3caff Update to 0.30.2 (close RHBZ#2229137)