$ git clone -n https://src.fedoraproject.org/rpms/ghc-hashtables.git /var/lib/mock/f38-build-side-42-init-devel-963288-28792/root/chroot_tmpdir/scmroot/ghc-hashtables
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-963288-28792/root/chroot_tmpdir/scmroot/ghc-hashtables'...
$ git fetch origin 5a71b86208b8415476ca7843096bbb6352f3ad73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hashtables
 * [new ref]         5a71b86208b8415476ca7843096bbb6352f3ad73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a71b86 Convert to %autorelease and %autochangelog