$ git clone -n https://src.fedoraproject.org/rpms/python-sqlalchemy.git /var/lib/mock/f40-build-791265-137274/root/chroot_tmpdir/scmroot/python-sqlalchemy
Cloning into '/var/lib/mock/f40-build-791265-137274/root/chroot_tmpdir/scmroot/python-sqlalchemy'...
$ git fetch origin c6b2588eb093fd73d4720070056b961c8f45d395:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sqlalchemy
 * [new ref]         c6b2588eb093fd73d4720070056b961c8f45d395 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6b2588 Update to 2.0.27