$ git clone -n https://src.fedoraproject.org/rpms/python-jiter.git /var/lib/mock/f42-build-side-1-3587374-46931/root/chroot_tmpdir/scmroot/python-jiter
Cloning into '/var/lib/mock/f42-build-side-1-3587374-46931/root/chroot_tmpdir/scmroot/python-jiter'...
$ git fetch origin 3e996730b83e7ac696f385b719809bb2cadc6221:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jiter
 * [new ref]         3e996730b83e7ac696f385b719809bb2cadc6221 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e99673 Update to version 0.10.0; Fixes RHBZ#2367125