$ git clone -n https://src.fedoraproject.org/rpms/python-sqlalchemy.git /var/lib/mock/f40-build-796673-140843/root/chroot_tmpdir/scmroot/python-sqlalchemy
Cloning into '/var/lib/mock/f40-build-796673-140843/root/chroot_tmpdir/scmroot/python-sqlalchemy'...
$ git fetch origin 06df4f9689a52b5f9da0fa426d89f0f4c2c74609:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sqlalchemy
 * [new ref]         06df4f9689a52b5f9da0fa426d89f0f4c2c74609 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06df4f9 Update to 2.0.28