$ git clone -n https://src.fedoraproject.org/rpms/traceroute.git /var/lib/mock/f40-build-2225088-52806/root/chroot_tmpdir/scmroot/traceroute
Cloning into '/var/lib/mock/f40-build-2225088-52806/root/chroot_tmpdir/scmroot/traceroute'...
$ git fetch origin f95e2b7bc6ed9d10749a2512cf610f6a5e82cec0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/traceroute
 * [new ref]         f95e2b7bc6ed9d10749a2512cf610f6a5e82cec0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f95e2b7 Update to 2.1.5