$ git clone -n https://src.fedoraproject.org/rpms/cscppc.git /var/lib/mock/f40-build-1542504-23937/root/chroot_tmpdir/scmroot/cscppc
Cloning into '/var/lib/mock/f40-build-1542504-23937/root/chroot_tmpdir/scmroot/cscppc'...
$ git fetch origin f7c84807fad18787052f1b9c8a60a502c6f1fc3b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cscppc
 * [new ref]         f7c84807fad18787052f1b9c8a60a502c6f1fc3b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7c8480 update to latest upstream (2.2.5)