$ git clone -n https://src.fedoraproject.org/rpms/ghc-data-default-instances-dlist.git /var/lib/mock/f38-build-side-42-init-devel-884623-28488/root/chroot_tmpdir/scmroot/ghc-data-default-instances-dlist
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-884623-28488/root/chroot_tmpdir/scmroot/ghc-data-default-instances-dlist'...
$ git fetch origin 975fe185a40908e58a0e329ba4b7c938074d146c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-data-default-instances-dlist
 * [new ref]         975fe185a40908e58a0e329ba4b7c938074d146c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 975fe18 Convert to %autorelease and %autochangelog