$ git clone -n https://src.fedoraproject.org/rpms/python-proton-client.git /var/lib/mock/f38-build-side-42-init-devel-849632-28425/root/chroot_tmpdir/scmroot/python-proton-client
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-849632-28425/root/chroot_tmpdir/scmroot/python-proton-client'...
$ git fetch origin 412ad602c82917eb4f3ad4ba92cdfa4f5e976e39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-proton-client
 * [new ref]         412ad602c82917eb4f3ad4ba92cdfa4f5e976e39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 412ad60 Added the README