$ git clone -n https://src.fedoraproject.org/rpms/ghc-vault.git /var/lib/mock/f38-build-side-42-init-devel-885363-28488/root/chroot_tmpdir/scmroot/ghc-vault
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-885363-28488/root/chroot_tmpdir/scmroot/ghc-vault'...
$ git fetch origin ac41f0edfba8d4707170e52ddf23626a6b4256a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-vault
 * [new ref]         ac41f0edfba8d4707170e52ddf23626a6b4256a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac41f0e Convert to %autorelease and %autochangelog