$ git clone -n https://src.fedoraproject.org/rpms/traceroute.git /var/lib/mock/f39-build-2058636-49142/root/chroot_tmpdir/scmroot/traceroute
Cloning into '/var/lib/mock/f39-build-2058636-49142/root/chroot_tmpdir/scmroot/traceroute'...
$ git fetch origin e7b760fe5f99c22c379e0861d8b1c21db6bf05d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/traceroute
 * [new ref]         e7b760fe5f99c22c379e0861d8b1c21db6bf05d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7b760f Update to 2.1.5