$ git clone -n https://src.fedoraproject.org/rpms/mftrace.git /var/lib/mock/f40-build-2200584-51785/root/chroot_tmpdir/scmroot/mftrace
Cloning into '/var/lib/mock/f40-build-2200584-51785/root/chroot_tmpdir/scmroot/mftrace'...
$ git fetch origin 1df1fe1c987e22efd6ad15ab72fb384244bf9c0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mftrace
 * [new ref]         1df1fe1c987e22efd6ad15ab72fb384244bf9c0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1df1fe1 Drop dependency on 2to3