$ git clone -n https://src.fedoraproject.org/rpms/python-jupyter-server-ydoc.git /var/lib/mock/f38-build-side-42-init-devel-688749-26783/root/chroot_tmpdir/scmroot/python-jupyter-server-ydoc
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-688749-26783/root/chroot_tmpdir/scmroot/python-jupyter-server-ydoc'...
$ git fetch origin df3cd0ca6f3cb8c504eeb03a72742dad70c00d2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jupyter-server-ydoc
 * [new ref]         df3cd0ca6f3cb8c504eeb03a72742dad70c00d2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df3cd0c Initial import (fedora#2161522).