$ git clone -n https://src.fedoraproject.org/rpms/python-img2pdf.git /var/lib/mock/f42-build-side-1-3586778-46925/root/chroot_tmpdir/scmroot/python-img2pdf
Cloning into '/var/lib/mock/f42-build-side-1-3586778-46925/root/chroot_tmpdir/scmroot/python-img2pdf'...
$ git fetch origin 4f6306786947e82d1637e163e9cc25e615ea497a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-img2pdf
 * [new ref]         4f6306786947e82d1637e163e9cc25e615ea497a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f63067 bump to 0.6.0 upstream