$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-TreeDumper-Renderer-GTK.git /var/lib/mock/f40-build-2212586-52277/root/chroot_tmpdir/scmroot/perl-Data-TreeDumper-Renderer-GTK
Cloning into '/var/lib/mock/f40-build-2212586-52277/root/chroot_tmpdir/scmroot/perl-Data-TreeDumper-Renderer-GTK'...
$ git fetch origin 5fc68de1ca7b3fec9b2b7cdcab995b9aa96f0277:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-TreeDumper-Renderer-GTK
 * [new ref]         5fc68de1ca7b3fec9b2b7cdcab995b9aa96f0277 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5fc68de 0.03 bump (rhbz#2246640)