$ git clone -n https://src.fedoraproject.org/rpms/PackageKit.git /var/lib/mock/f41-build-side-1-3049084-37873/root/chroot_tmpdir/scmroot/PackageKit
Cloning into '/var/lib/mock/f41-build-side-1-3049084-37873/root/chroot_tmpdir/scmroot/PackageKit'...
$ git fetch origin b29689400f78a7b67afe62bf1fb4bcc07df53b04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/PackageKit
 * [new ref]         b29689400f78a7b67afe62bf1fb4bcc07df53b04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b296894 Backport patch to fix system upgrade in KDE Plasma