$ git clone -n https://src.fedoraproject.org/rpms/ghc-fclabels.git /var/lib/mock/f38-build-side-42-init-devel-930188-28746/root/chroot_tmpdir/scmroot/ghc-fclabels
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-930188-28746/root/chroot_tmpdir/scmroot/ghc-fclabels'...
$ git fetch origin ef36c159166265d048319a7212f1794810b14664:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-fclabels
 * [new ref]         ef36c159166265d048319a7212f1794810b14664 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef36c15 Convert to %autorelease and %autochangelog