$ git clone -n https://src.fedoraproject.org/rpms/python-jiter.git /var/lib/mock/f41-build-side-1-3137240-39791/root/chroot_tmpdir/scmroot/python-jiter
Cloning into '/var/lib/mock/f41-build-side-1-3137240-39791/root/chroot_tmpdir/scmroot/python-jiter'...
$ git fetch origin 78237a672ec02e8b0316bff676e0a6fcd554988d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jiter
 * [new ref]         78237a672ec02e8b0316bff676e0a6fcd554988d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78237a6 Added the README