$ git clone -n https://src.fedoraproject.org/rpms/trafficserver.git /var/lib/mock/f42-build-side-1-3517611-46098/root/chroot_tmpdir/scmroot/trafficserver
Cloning into '/var/lib/mock/f42-build-side-1-3517611-46098/root/chroot_tmpdir/scmroot/trafficserver'...
$ git fetch origin 23ea1c82c910a4873813920bd4faebb21cc3bbae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/trafficserver
 * [new ref]         23ea1c82c910a4873813920bd4faebb21cc3bbae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23ea1c8 Update to upstream 10.0.5