$ git clone -n https://src.fedoraproject.org/rpms/ghc-wai-handler-launch.git /var/lib/mock/f38-build-side-42-init-devel-1072656-29786/root/chroot_tmpdir/scmroot/ghc-wai-handler-launch
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1072656-29786/root/chroot_tmpdir/scmroot/ghc-wai-handler-launch'...
$ git fetch origin dec91f95bc4519b972f193660ab526948f3fbfee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-wai-handler-launch
 * [new ref]         dec91f95bc4519b972f193660ab526948f3fbfee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dec91f9 Convert to %autorelease and %autochangelog