$ git clone -n https://src.fedoraproject.org/rpms/ghc-fast-logger.git /var/lib/mock/f38-build-side-42-init-devel-595967-26162/root/chroot_tmpdir/scmroot/ghc-fast-logger
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-595967-26162/root/chroot_tmpdir/scmroot/ghc-fast-logger'...
$ git fetch origin 97dd1c3700652f67810b2eaca84f1fe7a525e850:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-fast-logger
 * [new ref]         97dd1c3700652f67810b2eaca84f1fe7a525e850 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 97dd1c3 update to 3.1.1