$ git clone -n https://src.fedoraproject.org/rpms/ghc-th-abstraction.git /var/lib/mock/f38-build-side-42-init-devel-719977-27296/root/chroot_tmpdir/scmroot/ghc-th-abstraction
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-719977-27296/root/chroot_tmpdir/scmroot/ghc-th-abstraction'...
$ git fetch origin c59b03b612dbcab279a5d7551a68bb348a2d0bfb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-th-abstraction
 * [new ref]         c59b03b612dbcab279a5d7551a68bb348a2d0bfb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c59b03b Convert to %autorelease and %autochangelog