$ git clone -n https://src.fedoraproject.org/rpms/ghc-crypto-random.git /var/lib/mock/f38-build-side-42-init-devel-904453-28620/root/chroot_tmpdir/scmroot/ghc-crypto-random
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-904453-28620/root/chroot_tmpdir/scmroot/ghc-crypto-random'...
$ git fetch origin 7e67ea6409694b9795c2904e9a0c32ff860ad7fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-crypto-random
 * [new ref]         7e67ea6409694b9795c2904e9a0c32ff860ad7fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e67ea6 Convert to %autorelease and %autochangelog