$ git clone -n https://src.fedoraproject.org/rpms/python-gunicorn.git /var/lib/mock/f39-build-1629424-39547/root/chroot_tmpdir/scmroot/python-gunicorn
Cloning into '/var/lib/mock/f39-build-1629424-39547/root/chroot_tmpdir/scmroot/python-gunicorn'...
$ git fetch origin 90a96a7248e280ba53f7ddfe24db88a4aa3a4319:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-gunicorn
 * [new ref]         90a96a7248e280ba53f7ddfe24db88a4aa3a4319 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90a96a7 Update to version 21.2.0, resolves rhbz#2223435