$ git clone -n https://src.fedoraproject.org/rpms/PackageKit.git /var/lib/mock/f40-build-734575-105966/root/chroot_tmpdir/scmroot/PackageKit
Cloning into '/var/lib/mock/f40-build-734575-105966/root/chroot_tmpdir/scmroot/PackageKit'...
$ git fetch origin 9cd11bdfaa6ed5fbf35016d8f1d7072fbae29c2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/PackageKit
 * [new ref]         9cd11bdfaa6ed5fbf35016d8f1d7072fbae29c2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9cd11bd Backport PR #643 to fix symbol errors on Rawhide