$ git clone -n https://src.fedoraproject.org/rpms/kgraphviewer.git /var/lib/mock/f42-build-side-1-3568177-46743/root/chroot_tmpdir/scmroot/kgraphviewer
Cloning into '/var/lib/mock/f42-build-side-1-3568177-46743/root/chroot_tmpdir/scmroot/kgraphviewer'...
$ git fetch origin f7e9dfb6f991d2dd83e9cb5a7ba922943e87178d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kgraphviewer
 * [new ref]         f7e9dfb6f991d2dd83e9cb5a7ba922943e87178d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7e9dfb 25.04.2