$ git clone -n https://src.fedoraproject.org/rpms/ghc-unix-time.git /var/lib/mock/f38-build-side-42-init-devel-797729-28067/root/chroot_tmpdir/scmroot/ghc-unix-time
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-797729-28067/root/chroot_tmpdir/scmroot/ghc-unix-time'...
$ git fetch origin 9688c6ce33a36a27f359f3d8c28be7b17455b8ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-unix-time
 * [new ref]         9688c6ce33a36a27f359f3d8c28be7b17455b8ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9688c6c Convert to %autorelease and %autochangelog