$ git clone -n https://src.fedoraproject.org/rpms/ghc-bytestring-nums.git /var/lib/mock/f38-build-side-42-init-devel-934282-28751/root/chroot_tmpdir/scmroot/ghc-bytestring-nums
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-934282-28751/root/chroot_tmpdir/scmroot/ghc-bytestring-nums'...
$ git fetch origin 8737e24ee01a1c0fc3747613788e9911a0c48d68:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-bytestring-nums
 * [new ref]         8737e24ee01a1c0fc3747613788e9911a0c48d68 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8737e24 Convert to %autorelease and %autochangelog