$ git clone -n https://src.fedoraproject.org/rpms/python-flask-migrate.git /var/lib/mock/f39-build-1646012-40368/root/chroot_tmpdir/scmroot/python-flask-migrate
Cloning into '/var/lib/mock/f39-build-1646012-40368/root/chroot_tmpdir/scmroot/python-flask-migrate'...
$ git fetch origin 871011968b272c4be760b86ef71a140db9286514:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-flask-migrate
 * [new ref]         871011968b272c4be760b86ef71a140db9286514 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8710119 Update to 4.0.5 (close RHBZ#2238541)