$ git clone -n https://src.fedoraproject.org/rpms/python-jaraco-stream.git /var/lib/mock/f45-build-31160-650/root/chroot_tmpdir/scmroot/python-jaraco-stream
Cloning into '/var/lib/mock/f45-build-31160-650/root/chroot_tmpdir/scmroot/python-jaraco-stream'...
$ git fetch origin 1d7d2cdc04d6eb78296611b4e68680a02442641b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jaraco-stream
 * [new ref]         1d7d2cdc04d6eb78296611b4e68680a02442641b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d7d2cd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild