$ git clone -n https://src.fedoraproject.org/rpms/ghc-criterion.git /var/lib/mock/f38-build-side-42-init-devel-1278132-30665/root/chroot_tmpdir/scmroot/ghc-criterion
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1278132-30665/root/chroot_tmpdir/scmroot/ghc-criterion'...
$ git fetch origin 4f57285d5e60e628df2669c0208c5dcffca99efa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-criterion
 * [new ref]         4f57285d5e60e628df2669c0208c5dcffca99efa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f57285 bump release