$ git clone -n https://src.fedoraproject.org/rpms/ghc-simple-cmd-args.git /var/lib/mock/f38-build-side-42-init-devel-712059-27252/root/chroot_tmpdir/scmroot/ghc-simple-cmd-args
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-712059-27252/root/chroot_tmpdir/scmroot/ghc-simple-cmd-args'...
$ git fetch origin 8f2f2596b16cadc2aab46dfdc12072aa8445841e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-simple-cmd-args
 * [new ref]         8f2f2596b16cadc2aab46dfdc12072aa8445841e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f2f259 Convert to %autorelease and %autochangelog