$ git clone -n https://src.fedoraproject.org/rpms/python-slackclient.git /var/lib/mock/f39-build-1426253-31588/root/chroot_tmpdir/scmroot/python-slackclient
Cloning into '/var/lib/mock/f39-build-1426253-31588/root/chroot_tmpdir/scmroot/python-slackclient'...
$ git fetch origin 9437438cf25c400194687f2f442986fe04f68968:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-slackclient
 * [new ref]         9437438cf25c400194687f2f442986fe04f68968 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9437438 3.20.0