$ git clone -n https://src.fedoraproject.org/rpms/ghc-esqueleto.git /var/lib/mock/f38-build-side-42-init-devel-1088456-30041/root/chroot_tmpdir/scmroot/ghc-esqueleto
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1088456-30041/root/chroot_tmpdir/scmroot/ghc-esqueleto'...
$ git fetch origin a1d50c649faefb0fd67b06b14254a16c9ed17093:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-esqueleto
 * [new ref]         a1d50c649faefb0fd67b06b14254a16c9ed17093 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1d50c6 Convert to %autorelease and %autochangelog