$ git clone -n https://src.fedoraproject.org/rpms/python-bytecode.git /var/lib/mock/f45-build-29791-641/root/chroot_tmpdir/scmroot/python-bytecode
Cloning into '/var/lib/mock/f45-build-29791-641/root/chroot_tmpdir/scmroot/python-bytecode'...
$ git fetch origin d1151798de4f7f766e340505ce73199c5b475f99:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-bytecode
 * [new ref]         d1151798de4f7f766e340505ce73199c5b475f99 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d115179 Update to 0.19.0