$ git clone -n https://src.fedoraproject.org/rpms/ghc-x509.git /var/lib/mock/f38-build-side-42-init-devel-876095-28452/root/chroot_tmpdir/scmroot/ghc-x509
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-876095-28452/root/chroot_tmpdir/scmroot/ghc-x509'...
$ git fetch origin 501d41a8117e96dfde61751b6d3527372736994a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-x509
 * [new ref]         501d41a8117e96dfde61751b6d3527372736994a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 501d41a Convert to %autorelease and %autochangelog