$ git clone -n https://src.fedoraproject.org/rpms/python-qrcode.git /var/lib/mock/f39-build-1630856-39644/root/chroot_tmpdir/scmroot/python-qrcode
Cloning into '/var/lib/mock/f39-build-1630856-39644/root/chroot_tmpdir/scmroot/python-qrcode'...
$ git fetch origin aac3768e1916365774a9b10fdee4d99a80379926:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-qrcode
 * [new ref]         aac3768e1916365774a9b10fdee4d99a80379926 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aac3768 Make pypng requirement optional