$ git clone -n https://src.fedoraproject.org/rpms/ghc-blaze-builder.git /var/lib/mock/f38-build-side-42-init-devel-934244-28751/root/chroot_tmpdir/scmroot/ghc-blaze-builder
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-934244-28751/root/chroot_tmpdir/scmroot/ghc-blaze-builder'...
$ git fetch origin 99961753cc667fad23dbb13ec677817d8efa1d19:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-blaze-builder
 * [new ref]         99961753cc667fad23dbb13ec677817d8efa1d19 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9996175 Convert to %autorelease and %autochangelog