$ git clone -n https://src.fedoraproject.org/rpms/polkit-pkla-compat.git /var/lib/mock/f40-build-2023852-46940/root/chroot_tmpdir/scmroot/polkit-pkla-compat
Cloning into '/var/lib/mock/f40-build-2023852-46940/root/chroot_tmpdir/scmroot/polkit-pkla-compat'...
$ git fetch origin fa7178b4ae992c11408bfe2c6460e85b47336498:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/polkit-pkla-compat
 * [new ref]         fa7178b4ae992c11408bfe2c6460e85b47336498 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa7178b use build macros: tstellar