$ git clone -n https://src.fedoraproject.org/rpms/python-gradunwarp.git /var/lib/mock/f40-build-800311-142894/root/chroot_tmpdir/scmroot/python-gradunwarp
Cloning into '/var/lib/mock/f40-build-800311-142894/root/chroot_tmpdir/scmroot/python-gradunwarp'...
$ git fetch origin e9c9a981f3df893b7d0424540a01125efe4230c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-gradunwarp
 * [new ref]         e9c9a981f3df893b7d0424540a01125efe4230c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9c9a98 Add Packit config