$ git clone -n https://src.fedoraproject.org/rpms/python-sqlalchemy.git /var/lib/mock/f39-build-2270350-54790/root/chroot_tmpdir/scmroot/python-sqlalchemy
Cloning into '/var/lib/mock/f39-build-2270350-54790/root/chroot_tmpdir/scmroot/python-sqlalchemy'...
$ git fetch origin 4d5eec2968f1d41cba02b99177ba5ff989f9224f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-sqlalchemy
 * [new ref]         4d5eec2968f1d41cba02b99177ba5ff989f9224f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d5eec2 Update to 1.4.51