$ git clone -n https://src.fedoraproject.org/rpms/kgraphviewer.git /var/lib/mock/f42-build-side-1-3533609-46362/root/chroot_tmpdir/scmroot/kgraphviewer
Cloning into '/var/lib/mock/f42-build-side-1-3533609-46362/root/chroot_tmpdir/scmroot/kgraphviewer'...
$ git fetch origin 470affd0e66db0b87cf8a1e401023cb5a5aa420e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kgraphviewer
 * [new ref]         470affd0e66db0b87cf8a1e401023cb5a5aa420e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 470affd 25.04.1